Thank you for posting the quick reply. I edited my post as follows but the edit window is very short and it expired. This is what I was trying to post:
On the chance that this was about my post, what you say is true, that there are players who were not the best in college who later developed in the NFL. That is not applicable or the issue here. Look at the contrapositve of your statement, (or whatever the appropriate logical term is). There are very very few players who are ready for the NFL when NO one else on their team is -- who are not the best player on their team, on their side of the ball.
Yes, you cannot coach size or athleticism, and that is one reason why the NFL take flyers on players that are not yet quite ready to play in the NFL. And they then develop them. But if no one else on that team is ready for the NFL, almost by definition they are the college team's best on that side of the ball.