It's quite simple: TCU would tell DeLoss "No." And DeLoss knows it.
And, BTW, stop referring to the entity known as the "BIG XII" as such. In point of fact, it is UT and the little Conference they control. It is splintering because UT is calling all the shots, and taking all the money. Greed is destroying what was once the BIG XII, just as UT greed destroyed the old SWC. We at TCU have been down that road before, and having made our own fortune, are not willing to forget everything that has come to pass since then and willingly place the burnt orange shackles on ourselves. Baylor and Tech are happy to jangle their chains from time to time, but TCU has better things to do than be content to be a victim of UT in the future.
UT needs us, but we don't need UT.
Perhaps UT can ask UH and Rice? They're not particularly busy at the moment. I'm sure they be glad to be paid a little more money to be a UT punching bag. The upside for them is fabulous! All of the Media Sportswriting UT Lickspittles who currently deride and ridicule these fine institutions would suddenly see the light and tell us what storied, steeped-in-tradition programs they truly are, and how UT is really toughening up their Conference by inviting them. Yes, they would achieve Instant Media Resurrection just by accepting the invite.
Pathetic...