I guess I don't see how I'm missing your point. I already said above that it was a mistake by Gangwish as well as the secondary. So I would be in agreeance with you, Banker and the BYU coordinator.
As a separate but related piece of conversation, IMO, if I had to pick a part to screw up, I'd rather screw up the rush and have each receiver properly bracketed, I believe it to be a higher percentage play for the defense than attempting to get the sack or make a really atrocious throw (even bad throws end up usually in the vicinity of the receivers downfield, and already noted that very few Hail Mary's end in sacks). Hail Mary plays, seem to be like FG tries, not a lot of defenses seem to put a ton of effort into the rush part of the equation, guys kinda standing up, hands in the air, half spin moving to look like a good effort, even at the NFL level, and so you can get tons of running around in the backfield.
Banker as the DC, should aim for perfection and have both executed perfectly. In this case he got neither, and will be a goat with Riley until its rectified.
People are generally implying that, oh hey look, the BYU coaches are talking to their QB and the play worked out, they are such strategery geniuses. But we don't know what was said by BYU (as pointed out may have nothing to do with us since the kid may have never even run this play before), and we do know that our coaches took time out of their day to talk to their players too. But no one is really implying anything good about that because Gangwish screwed up anyway, along with I think frosh Williams in the secondary.