I'm just saying it's impossible to say X won't make it in the NFL or Y will. Nobody has a clue. Some guys have all the tools and bust, some guys are taken as a flyer late (Tom Brady, Tony Romo, etc) and the light just goes on when the ball is snapped. These NFL coaches just cross their fingers.
Will Levis seems like an overrated joke to me, and he'll probably end up in the NFL hall of fame. As mentioned before, Josh Allen couldn't hit the broad side of a barn in college, and now he's incredibly accurate. I didn't think Lamar Jackson's game would translate as well as it has. Sometimes the system they are drafted in can help or hurt, or the coaches they are drafted by can help or hurt. I think a bunch of the busts over the years may have actually had decent careers had they gone to better teams with better coaches. The ones that are drafted high naturally go to garbage desperation teams with little talent. I still remember David Carr 20 years ago getting sacked literally ten times a game. Who can succeed in that?
If Patrick Mahomes had been drafted by the Browns, would he be the absolute superstar he is today? I wonder. Work ethic is certainly a huge part of it - the guys like J Russell and Vince Young who didn't want to work will never make it no matter how much talent they have.