Some do.

[She doesn't actually know about a majority of the religions on earth.]

It's like I said before, all angels are born for a purpose. We all have some task or life mission to fulfill that makes us happy. Those who don't flee the realm and I believe the term is that they 'fall' though that isn't exactly how it goes.

[A perfect example of this is Lucifer who historically went from the angel of light to the Devil.]