I would be fine if my son wanted to attend BYU – I’d also be fine if he didn’t. Personally, I would rather he did attend BYU, since it’ll likely save me a lot of $$ if he does. East coast universities are running $20k and up per year for undergrads. BYU’s ~$5k is extremely affordable in comparison.
I attended Ricks College, the DW is a BYU alumna. I was taught evolution in biology class, a non-creationist view of the universe in physics while also attending religion classes. The “Churchiness” is laid on pretty thick, but it is a Church school, after all.
In short, BYU isn’t for everyone. For some kids, it’s heaven. Others really struggle there – just like anywhere else, I reckon.