Take off the Mormon goggles for just 2 seconds. BYU absolutley used Mcmahon to win, just like every other quarterback.
McMahon was the guy to do that. I heard an interview with my own ears that a reporter asked that very question.

Mcmahons reply was - "...of course they used me, but I used them also. I needed a school to show off my talent and they were the program to do that and they needed a guy to win. I did that."

reporter - "do you regret going to BYU..."

Mcmahon - "absolutley not, they taught me everything about football and what I know about life right now. I would do it the same all over again."