We all know the team prides itself on physicality. When that walk-on UCLA WR talked about being the tougher team, Utah took that as a major slap in the face and slapped them around. This is a great mentality to have when facing teams with inferior talent/coaching. However, we just saw what happens when you have that mentality with teams who are more talented than you. The other teams take it personally. Better athletes > More physical. Hence the reason Ohio State always beats up on the physical big 10 teams like Wisconsin and Michigan.
After the Pac-12 championship, Cristobal was asked what helped the players come out with so much fire. He said something along the lines of “I guess they got tired of hearing they were gonna get physically beat all week”. Texas players made similar comments before and after the game that showed they were very aware of Utah’s physicality perception. These were two instances of more talented teams easily beating a less talented team. The “we’re more physical than you” mantra will get you a lot of wins in the PAC 12, but when extremely talented teams like Oregon, USC and Texas use that as their own motivation, the physicality isn’t going to overcome their superior athletic ability.