I get the sentiment, and OU's offense is very flawed with an offensive efficiency ranking of 54. But, UT's is 41. For reference, Iowa is 48. OU and UT have by far the worst offensive efficiency ranking among playoff contenders. In an argument of more deserving, it might be a better argument against ND as they're 0-2 against teams in the playoff mix.
The problem is ND only lost by 3 to 10-2 Miami on a FG with a minute to play and by 1 to 11-1 aggy on a 4th down TD with eleven seconds left after ND missed an extra point while they've handled everyone else in a manner that they should. Easy to say they are a couple plays from undefeated. UT can talk away couple plays away from losses to tOSU and UF. But there's no undoing the UGA loss and no amount of "it was close until...." changes the final score.
Those three teams have an interesting look though:
Strength of Record: OU-9, UT-12, ND 13
Strength of Schedule: UT-8, OU 12, ND-42
Game Control: ND-5, OU-9, UT-17
Average in-game win probability: ND-5, OU-16, UT-45
Offensive efficiency: ND-3, UT-41, OU-54
Defensive efficiency: OU-4, ND-8, UT-11
Special teams: OU-2, UT-5, ND-64