It wouldn’t make sense since at all unless they had been forced to out of necessity. Pro baseball decided long ago that they weren’t satisfied with the quality of player coming out of HS and college and wanted to tightly control that quality. At great expense. Football isn’t as much of a skills based sport as baseball. More of a molding raw athleticism sport which colleges got very good at. And since colleges take so much pride in their football programs, they sank lots of money into them, and they became very watchable and started bringing in insane amounts of money. Which the university heads got addicted to and became willing to allow huge budgets to keep it rolling. It’s natural capitalistic flow which is fine but is finally reaching the boiling point where none of the participants will be amateurs at the big schools which I find a bit sad.