To be fair, Sark is justified in dropping any challenging OOC games.
Why?
Because tu has the benefit of an incredibly compliant media machine that is expected to place them in the top 5 pretty much every year, regardless of how good they actually are. If they continuously are placed at the top of the pile before the season starts, then the only place to go is down.
Contrast that with the Ags, who are normally ranked at OR BELOW where they would be, especially compared with tu's rankings. In other words, A&M has to prove itself annually to make its way INTO the national conversation, where tu is consistently given the benefit of a padded ranking before the season starts.
Two groups benefit from not playing challenging OOC schedules: The perennial blue bloods, and the potential Cinderallas.
The Ags are in neither of those groups, so we have to risk a competitive OOC game to get noticed.