UVU students have an opportunity to buy the passes though, they just have to do so through a BYU student. There are TONS of UVU students who go to the games.
I completely agree with the stance you have on academics being more important than athletics to BYU students. A lot just don't buy the passes because they can't afford and don't care. But you better believe that the students who do and attend the games are a very passionate group. The ROC has vastly improved since they brought the student section together last year. I expect the ROC to be completely full and loud on Saturday - I know last Thursday was a LOT of fun for me and my roommates.