Yeah, honestly I think these hardcore draft dudes just scour the NCAA for anyone who is athletic, can shoot it a bit, and is long and just overrate them based on the trend of the NBA going wing heavy. The results of a weak wing class is you got people throwing out hot takes to find wing sleepers.
Also think a guy like Kuzma gets undervalued because the rising sentiment seems to be "If the NBA is just going smaller, is there really a need for the "playmaking" 4 when you can just downsize to the more natural perimeter playing 3 playing the 4?" Since Kuzma doesnt have the defensive metrics (bad block and steal rate) that you want out of a guy with his size, I think people are rating him really low. Think his rebounding is being underrated in the process (because while it is good, it's not stand out amazing), and that is what makes him a viable prospect even if his playmaking skills never grow to the point where they are at a plus level.
