Except that quality of talent in the NFL has been on the decline in key areas and they don't develop talent anymore with the manner in which they practice.
NFL teams struggle to piece together decent offensive lines and if the scouting process has gotten simpler why do we continue to see more and more struggles finding capable quarterbacks.
They don't need fewer schools developing talent, they need more and they need more players staying with programs and getting developed instead of hoping to a new team each year.
The SEC and Big 10 are going to roll out players who can contribute sooner, but how many of those are maxed in terms of productivity? This is just an extension of the argument of why you shouldn't simply recruit from programs such as Katy, Lake Travis, Southlake, and Aledo. Those programs roll out some very good players, but a number are maxed out as well as been ground out and physically can't carry on much longer.
There was always that need for the recruit who was untapped, raw, with the higher ceiling and there is a need for the NFL to be draft from more than 40 teams.
Roughly just under 1,100 players from the SEC and Big 10 are in the NFL, but the league has over 2,200 players in it which means there are still a number of players from elsewhere and that math isn't going to change.