Iirc she was put into a catholic asylum type place when she was a teenager, and treated terribly. Presumably it’s where she saw up close and personal what the church was really doing.

It’s been a long time, but in the 80s, I recall the Catholic Church being known to be exactly what we know it’s to be now, but not in the same way. It wasn’t as widely accepted. As much as I despise this statement, it was also a VERY different time.