Every generation believes what they grew up is the how it is.
Well it isn't and never has been, whole thing is always evolving.
Used to be we had 180 schools playing Division I football and a dozen bowl games and depending on where you lived, you might not even get to watch four or five of those games unless your local TV station agreed to carry the Mizlou broadcast.
Used to be the only NCAA requirement for a student-athlete to be eligible was that they be enrolled full time. It was the conferences, many with in excess of 20 schools set rules like had to meet some standard of academic progress, the conferences determined what a scholarship could cover and should not. The conferences determined the maximum scholarships that could be awarded.
Sure this was back when Montana and Idaho were in what is now the Pacific-2 but it happened.
Well things are changing. The Big Ten and SEC have just almost collected every high TV value school in the nation. They are in a crack over litigation about their agreement to cap compensation rather than allowing the market to determine value. It sounds like they are offering to commit something like $15 million to $20 million per school to compensate athletes. Maybe they lump it all up on the stars, maybe they just pass it out to everyone on the roster. If they spread it to everyone then making the 105 roster at Texas might be worth $50,000 a year to a walk-on. That's before NIL money.
Right now there's no real money in Big Ten and SEC saying abracadabra AAC, MAC, Sun Belt, MWC, CUSA go away into another division.
No right now the benefit is for them to remain FBS and say see it's a free market, we aren't monopolizing it because those leagues have bowl agreements and tv deals and they can play their way into the CFP. We are complying with antitrust laws.