The Steph Currys, Klay Thompsons, Kawhi Leonards etc. were picked later in the draft. So I'm not sure how much a high pick would change the view. I believe it is all about the team culture. SA is a great example of that.
I don't disagree that team culture is a hugely important thing. But Gregg Popovich would be the first to admit that the Spurs culture really began with Tim Duncan who of course was a #1 pick and franchise changing player.
Depending on how Simmons looks when he comes back from injury the Sixers could have the the three best rookies this season. They'll still finish with a bad record, but the long term outlook (if Embiid stays healthy and Simmons is as advertised) should be very bright.The Timberwolves are struggling now but KAT is the real deal and if the T'Wolves build around him well they will be a contender in time. It's worth remembering that the Warriors have the only unanimous MVP in league history and yet they didn't have a winning record until Curry's 4th season in the league. It takes time and usually more than one star player for a team to become a real contender.
So where do those stars come from?
He are the best players in the league this year according to ESPN's ranking and their draft position
LeBron James (drafted 1st overall)
Steph Curry (7th)
Kevin Durant (2nd)
Kawhi Leonard (15th)
Russell Westbrook (4th)
Anthony Davis (1st)
Chris Paul (3rd)
James Harden (3rd)
Paul George (10th)
Damien Lillard (6th)
Karl Anthony Towns (1st)
Blake Griffin (1st)
DeMarcus Cousins (5th)
Draymond Green (35th)
Kyrie Irving (1st)
Of what is arguably the 15 best players in the NBA a third of them were drafted #1 overall. Two thirds were top 5 picks. Only two were taken out of the top ten and only one was taken in the 2nd round. In fact, other than Draymond, all were taken in the first half of the first round.
A little further down the list (#21) you get a late first rounder in Jimmy Butler and a few more slots down (#29) is our own Mr. Irrelevant turned all-star in Isaiah Thomas but most of the top ranked players (and again we can argue over the ordering) are top 10 and usually top 5 draft picks.
Yes, there are always gems that bad teams overlook and good teams snatch up. Tony Parker late in the first and Ginobili in the second not to mention trading George Hill to draft Kawhi at 15. Klay at 11 and Draymond at 35. DeAndre Jordan in the second round. Some of that is scouting, a stable organization that knows how to target players/knows how a specific guy will fit in with your team concept and part of it is luck. The Warriors hit a homerun with Draymond but they took Festus Ezeli ahead of him and could have lost him to another team drafting early in the 2nd. He was a jack of all trades, master of none with a high floor but low ceiling. At least that was the thinking. The Spurs thought Leonard could be groomed as a Bruce Bowen replacement. Even they were surprised at the huge growth in his game. So when preparation and luck combine you get some real success stories. Considering the dysfunction of the Kings and the fact that they drafted Jimmer in the first round, IT's success has to be viewed as luck on the Kings part in terms of drafting him but mostly hard work and talent on IT's part. He succeeded in spite of the culture in Sacramento.
So yes, not every great NBA player was a high draft pick. But most were. And obviously lots of busts in the top of each draft too. Having high picks doesn't guarantee future success, but having high picks and drafting the right guys pretty much does. And of course having high picks in strong drafts. The current draft class has been underwhelming thus far but the next draft should be much stronger. And while it's too early to say for sure, the draft after that looks to be strong up top too.
If the Kings could trade Cousins to Boston for the Nets picks and other pieces (combined with the Kings nosediving without Cousins) Sacramento could end up with two top 7 (or even two top 5, maybe even first overall) picks in both this draft and the next one. If they hit on two of those four picks, you have a foundation that can change the culture and build a winning team. If they miss on most or all of those picks then they are in as bad or worse position than before.