The only things that UC are "bigoted" against in the a-g approval process are poor textbooks and poor courses. Religion belongs in Social Studies. Anyone who tries to bring it into to Physics or Math or English is going to be rightly rejected.
And why does it matter? If anything, the crappy books handicap the students, but if they (or their parents) decide to use them what business of the UC is to interfere.
What matters is the applicant's knowledge and ability. It matters not how he achieved it. C'mon, you are an engineer.
Many people home school their kids. I have a friend (the most brilliant person I've ever met) who home schooled his kids. Are you going to go after them next? Cod knows what they teach their own kids. Obviously we can't have people influence/teach their own kids. They are a property of the state after all, so they have to be taught "properly" from the "proper" and "approved" books.
Why does not merit, skill, intelligence and ability matter any more. The mediocre "educators" will decide what is the "proper" education, and Cod forbid some of us are smarter than others.