LOL. So areas like Houston, San Antonio, Dallas, etc aren't significant tv markets?...just stop before I laugh too hard.
You're comparing apples and jigsaws. Those markets are not automatically "owned" just because U. of Houston or A & M are located there. There still has to be a draw.
The SEC is already nationwide. If the conference just took the significant teams, Texas, Okla., and Nebraska it would make some difference. I just don't think so about A & M. Or Texas Tech. Or Houston. Or Okla. St. -to name some more. Maybe 10 years from now when rivalries might develop.
Chicago or Cincinnati or St. Louis would tune in to see Texas and Alabama or Florida and Nebraska or Georgia and Oklahoma (and others) and those cities are not SEC markets. There would be not much draw for A & M vs. any of those schools in a regular season game in those cities.