There's only so many ways I can say the same thing, but it's dumbfounding to me the extant to which people here are willing to gamble on low-ceiling talent year after year that almost never returns good value at the top of the draft and aren't willing to take a no more risky gamble on elite talent that actually has a chance of making us better.
I feel like you're learning the wrong lessons here. When we picked Jimmer people said he was NBA ready because he played 4 years in college and had an NBA ready skIll. Trouble is, he was never an NBA caliber athlete and his defense was non-enon-existent. In actual fact, he never adjusted because he couldn't adjust. He can't get taller or faster or become a better athlete. The guys we could have picked like Brandon Knight or Kawhi Leonard were considered projects with bust potential who would take years to get up to speed. Those were NBA athletes though and they're currently legit NBA players. That's lesson number 1: college stars don't automatically become NBA stars. That's why "upside" and "potential" are actually significant considerations and college production is a lot less important than people make it out to be.
When we picked Thomas Robinson he was a little undersized, a little raw but a great athlete and a beast on the glass. He wasn't a great fit next to Cousins, but he could have been a nice bench big. We passed on "risky" prospects like Harrison Barnes and Andre Drummond who had elite potential and all of them developed faster. Robinson didn't fail here because he's a poor basketball player though, he failed because people expected too much too soon. He may yet develop into a solid NBA big man. Did we get any better by trading him for Patrick Patterson? Not even a little bit. That's lesson number 2: upperclassmen don't develop any faster -- everyone has to adjust to the NBA level. Actually, younger players tend to have a faster growth curve because they're getting world class training earlier in their development cycle. And there's no shortcuts to success, development takes time.
So here we are this year and once again I'm reading about why we need familiar names like Cauley-Stein or Kaminsky because people watched them play in college for 3 years amd win NCAA level accolades and they assume they'll play the same way in the NBA. It almost never works out that way. And people are writing off Emmanuel Mudiay and Stanley Johnson because they struggled a little bit at times this year and didn't play for championship level teams. That's completely missing the point...
The athleticism and court vision that Mudiay has are unteachable and put him in a class of his own compared to every other PG in the draft besides Russell. I hear people say all the time that seeing the floor and picturing passing angles before they even exist is something you're born with. Mudiay has that skillset in a 6'4" frame with an explosive first step, good body control in the air, and good rebounding instincts. His ceiling reaches as high as "best PG in the NBA". Damn right I'll take a chance on that talent before I settle for a guaranteed roleplayer because, as we saw with Jimmer, not even that is a guarantee.
The defensive instincts, nose for the ball, and functional strength that Stanley Johnson displayed this season are elite even at the NBA level. Does it bother me that his shot is a little flat and he struggled to finish inside? Not really. Those are both correctable issues that frankly any person on this planet could improve with sufficient practice. You're telling me you don't want a prospect with the strength to back down most opposing forwards in the post and the lateral quickness and wingspan to stay in front of guards because his shot isn't perfect? Talk about missing the forest for the trees.
I'm only going to say this one more time and then I'll shut up about the draft because it's no fun trying to have a discussion with people who ignore everything you have to say. When you look at prospects don't look at the player they are now because unless they're a once in a generation talent like Lebron, none of them are NBA ready. What you're actually looking for is a glimpse of the player they'll be 3 years from now because that's a much closer comparison to the player they'll be for the rest of their career. Ask yourself if they have room to get any better, if their flaws are correctable ones or biological limitations that can't be overcome. Are they big enough, strong enough, fast enough to keep up with some of the best athletes in the world? Do they demonstrate superior basketball instincts or do they need to be told before they'll do anything (this is usually pretty easy to diagnose, believe it or not)?
On the statistical side, shooting percentages are less important than when, where, and how they shoot. The first one is a symptom not a root cause and fraught with statistical noise for younger players with less of a track record. The when, where, and how is what tells you how well they'll integrate into an NBA offense. Do't let underwhelming physical measurements affect your opinion at all unless they're extreme. 9 out of 10 players who fail do so for other reasons. The college season is short So you're looking for trends more than year end stats. Look at their boxscores throughout the season. What's their peak as a scorer, rebounder, and passer? How often did they get there? Are they trending down or up? You also can't compare freshman stats to upperclassman stats. Start with everyone's freshman year to put them in a more even plane, and then project forward.
If you can answer all of those questions for yourself, and really do consider everybody not just the top 6 players you see in mock drafts, you might actually have an NBA big board that won't get laughed at 5 years from now when we know where everybody stands.