Football does drive the bus because it's where the P5 schools get their money. Even
Swofford admits that football provides 80%-85% of their revenue, with basketball being the other 15%. It's what allows the conferences to have conference networks and, through media fees and ticket sales, provides income for the department. Even the tv numbers tell that tale.
For a reference, this years OSU/Rutgers game drew a 3.0. People will watch football. It's what allows networks to force cable carriers to carry the network. The SECN was very quick to get everyone aboard because the football crazy SEC would have switched to those carriers that would carry it.
Even with their tiny footprint, the Big12 had a 5.0 tv rating this past year. TCU, Baylor, Oklahoma and Okie St were all top five teams at some point this past year. For all of the ACC's bluster about footprint, they only had a 6.1. The lack of football "cache" is what's preventing the ACC from having a network. There's no desire to have one. If FSU and Clemson were leaving unless The ACC brought in football "cache," then they made the right decision. The ACC would have been fatally damaged if those two left and UConn providing the NYC market wouldn't have stopped it.
If there is going to be a Big12 Network, it's because of football. UConn will help it make money, but it's the football "cache" that will make it happen.