In basketball one great player can make a world of difference and cause an upset. In football that player isn't even on the field half of the game.
You point to NCAA tourney as an example, I point to how many people tuned out of the Sugar Bowl as Georgia was giving it to Hawaii in every orifice. The schools that win the CUSA, MAC and especially the Sun Belt would get whitewashed every year by the SEC, Pac12, Big12, hell even the ACC champs in a way that wouldn't even be fun to watch.