It seems completely incompetent to judge a player solely by individual or even group workouts. The point of college, which is admittedly corrupt and less than ideal, is that you not only get to see players in a team environment against appropriate compe ion, you get (hopefully) strong coaching in aspects that need to be improved. One of the biggest problems of the one-and-done era, which has impacted the NBA for years now, is that players still don't really know how to be coached or improve. They just... play. This has hurt the guys coming out of Duke once Ratface switched to leaning on these players. It hurts a lot of Kentucky players. Sure, there are exceptions, but after a burst of exceptional play, they often stall out.
So not only do a lot of fans get caught up in ESPN-level hype on atheleticism, rumor, and clips on Youtube, so do some teams. When we don't even know what these guys -- the Emoni Bates types -- can actually do, you know, playing actual basketball.