Let me see if I can clarify my point, because I don't necessarily disagree with you... I just don't think yours and mine are as diametrically opposed as you're suggesting...
We, message board fans inherently view the draft, essentially in a vacuum. We each use use just a just a couple of inputs (our own eyes, others' opinions, various mock drafts) to form our opinions on these draft prospects. For better or worse, that picture is a lot clearer -- its easier to *logic* your way into thoughts like yours above (which I, again, don't necessarily disagree with). The problem there, is that those don't always take into account of how the draft shakes out in
real life, where GMs are wading through a TON more inputs than we are.
In the real-life draft, GMs' decisions are affected by countless pressures and conscious and unconscious biases... To name a few: a ticking clock, trade offers on the table and their perspectives on what "value" means in that given moment, what the media will say, what their owner wants, what their scouts and coaches and star players want, fear of losing their job (and how that affects their real-life family) and personal feelings on risk vs. reward, how interviews went with draftees, additional info (like health check ups/background info/intelligence testing) that we're not always privy to -- teams spend hundreds of thousands of dollars every year trying to uncover ANYTHING that might be a reason to not pick a kid, how their pick may affect team sponsors (see: Telfair, Sebastian), what they think other teams are going to do, previous successes/failures, inherent biases on things like body type/race (it happens), etc., what the analytics say, how they think free agency will play out, what the short and long-term plans are for the team and their perspectives on needs, fit, etc. (which may differ from our visions), inside info on guys already on the roster (ie. how they may be recovering from injury, if they're unhappy and requesting a trade, etc.), how the draft has shaken out above them, position scarcity in the draft and free agency (again, the world only produces so many 7-footers), how city culture might affect a kid and vice versa, etc....
At the end of the day, each draft selection is a combination of all of these factors, plus good-old-fashioned gut, and historically, the prevailing wisdom in the NBA has been, when in doubt, draft big.
In the last 25 drafts, a
minimum of 3 big men (PFs and Cs) have been drafted in the lottery, and that happened
once. In 80% of the drafts over that time period,
at least 6 bigs have been taken in the lottery. My point was more that it doesn't feel like mock drafts are taking that into account yet. Every year there are kids who test off the charts who fly up draft boards because teams can't resist drafting potential over substance. The era of advanced stats also produces thoughts
like this one (really interesting read) that might not affect ALL GMs, but might affect some.
My eyes tell me that the most talented players in the draft are (in approximate order):
Josh Jackson, Jayson Tatum, Dennis Smith, Lonzo Ball, Markelle Fultz, DeAaron Fox, Malik Monk, Zach Collins, Jon Isaac and Markkanen. But I'd be willing to wager that a few random names sneak into the lottery that are unexpected based on all the factors above. Doesn't mean they're good, smart, or logical picks, but like every other year, I think it'll happen at least a couple times...