I think the conventional wisdom about basketball being about the inside/outside game used to be true. Even after the Warriors won their first title I was still making the argument you're making now: that it wasn't sustainable. Their shooters got hot, every team they faced was limited by an injury to a key player. Basically that a team winning with run and gun was a fluke and defense-first was still the right way to build a dynasty. Look at the Spurs, look at the Kobe/Shaq Lakers. Teams win multiple titles with fundamental basketball and a dominating post presence. Or so the argument goes. So believe me, I understand your point of view because it used to be mine. But that version of basketball is over. The Warriors ditched Bogut, added another shooter, plugged in journeymen at C (JaVale McGee, Zaza Pachulia, Damian Jones) and got
even better. I can't emphasize this point enough. Even if/when the Warriors start losing key pieces the Genie is already out of the bottle. And here's why:
I also watched the new wave of bigmen come in to the league who were supposed to swing the pendulum back to interior scoring. Joel Embiid with has Dream Shake. Mr do-it-alls Anthony Davis and Karl Anthony Towns. Even our own Boogie Cousins who is so big and skilled he's basically unguardable in the post. Doesn't matter. Minnesota cratered, New Orleans spins their wheels (more on that later), Philly built their offense around Ben Simmons pick and roles. We all know what happened with Boogie. To reinforce the point... the only bigman in the MVP conversation right now is a 7 footer who plays like a super-sized guard up in Milwaukee. It's over for post play. The other team is hoping you throw it into the post because a dunk is better for them than a three pointer. Unless you've got a big guy who can score every time down the floor in 5 seconds or less you're not beating an all-out perimeter assault with the inside out game. It's possible this version of the NBA is in the process of evolving into something else but it's not going back to what it was, ever. Not unless there are significant rule changes made to slow down the pace or mitigate the value of a three point shot. No amount of crowing from the stands is going to change that.
You made a point about Anthony Davis being held back by his team but let's examine that further. My thesis is that New Orleans has failed AD in the same way that we failed Boogie... they tried to build a traditional team around him without accounting for the way the game has changed. They traded a lotto pick to get Jrue Holiday, an All-Star PG best known for being pretty good at everything but not great at anything. He averages 1 to 1.5 threes per game at 35%, he can score but he's not great in iso situations, and he's one of the better defenders at his position. Conventional wisdom says to run pick and rolls and get the ball to your bigman. Put a shooter or two on the wing for kickouts. They had Eric Gordon and now they have ETwaun Moore. Solomon Hill was supposed to be their 3 and D wing but he didn't pan out. Then they matched Davis up with a second big man. Even when that second big was DeMarcus freakin Cousins they were just a .500 team. This parallels the strategies our front office employed to build a team around Cousins. Fingers have been pointed at coaching, front office dysfunction, poor drafting, and of course DeMarcus himself. In retrospect the answer was always much simpler...
We're not in the midst of a three pointing shooting fad, the entire focus of the game has shifted out to the perimeter. At this point even third graders could tell you that trading 2s for 3s is an untenable strategy. Well they probably would use a different word. A word like dumb. It's just plain dumb. And in that regard, trading DeMarcus for an elite shooter like Buddy Hield has proven to be Vlade's masterstroke. So many of us shook our heads and mocked him for it. We were wrong! Buddy Hield is the second best shooter in the entire league this season and he's already led us further as the team's leading scorer than Boogie could. That's not Boogie's fault, and to his credit he's made the adjustment to take his game out to the perimeter. It's just an unfortunate bit of bad timing that we landed a franchise big men in the first era where the big man is literally irrelevant. You just don't need them anymore.
The last statement I want to address is the matter of Bagley being a star. This is a thorny issue for a lot of reasons but I just want to explain why I had Bagley ranked 10th* in the draft this year instead 1st or 2nd. When he reclassified and joined Duke right before the start of last season I had him ranked #2 right after Ayton. I saw all the same things you saw in his high school videos. He's big, fast, smooth with the ball, and a super-athlete. Seems pretty can't miss. But over the course of the season I saw some things I didn't like. Almost all of his offense came from rolling to the basket, cleaning up offensive boards, facing up from midrange and driving to the basket, or the occasional midrange jumper. He didn't dominate games with passing or defense or high degree of difficulty shots (all of which Ayton showed in flashes at Arizona) he simply overwhelmed them with volume. I also saw that his awareness of team defense was hurting his team. You could make the argument that what Bagley had going was already working so well, why would he need to diversify his skillset as an offensive player? Coach K kept feeding him the ball and he kept finding ways to put it in the basket. That's what you want right? Guaranteed star? All-Star, yes. That's primarily a matter of having big numbers and he
will get those (his Dad demands it!

). But there's still the issue of trading 2s for 3s. That's dumb, remember? Bagley might score 25 a game but unless he's making more than a handful of threes, the points per possession will still be low enough to prevent him from being a #1 guy on a championship team in today's NBA.
But wait, it worked for Shaq you say. Yes well the reason it worked for Shaq is because teams had 2 shooters in the floor then. Ray Allen and Reggie Miller were Hall of Famers because they averaged 2 to 3 made threes a game. So far this season there are 56 players averaging 2 or more threes a game and you can add another 30 names if you round up. There will never be another player like Shaq because if he still played today he would have to become either a three point threat or a screening and passing maestro like Jokic or he would be ignored on offense. He couldn't even make his free throws! The stats guys in every front office would go nuts if he got the ball 30 times a game!
So what I'm saying is that Bagley being a sure thing 20 and 10 guy with decent defense is simply not enough anymore. Yeah, lifes not fair. That doesn't mean he can't be the right kind of star for today's NBA but it does mean that the 'sure thing ' next to his name should probably be written in pencil not pen. He has yet to show a reliable long-range jumper or an advanced aptitude for making smart passes and those are the benchmarks now of a franchise player. He could carve out a niche instead as a deluxe garbage guy, the fleet-footed high flying compliment to DeAaron Fox's "always on 11" speed game and that's what we all hope is going to happen but don't we kindof have that already in Cauley-Stein? Is that a guy you need to use a top 5 pick on? Couldn't we have Bamba or Jackson instead if the primary offensive role is merely to finish off lobs while benefiting from their stifling defensive presence?
That's just me thinking out loud. I don't know. My point is that I don't see a clear path to stardom, that is franchise player level stardom, for Bagley that doesn't require him to develop some nascent ancillary parts of his game into his bread and butter. Otherwise he tops out as a third option to Buddy and Fox. Or maybe complimenting a dominant backcourt is the best we can hope for anyway in the era of irrelevant big men.
*EDIT: Actually, I think I had him 8th in the draft. I can't remember where I had Sexton and Young ranked. I probably had him too low regardless.