Right, but... while the requirement for INT supports "cleric who doesn't know anything about their religion" it also makes it significantly harder to play "cleric who does know something about their religion" - which probably should be more viable than "the wizard happens to know all this stuff randomly"
I was raised Mormon, and had always been taught that if you get to the highest heaven, you'll become a god and make your own world. Only after I left did I find out that that's not actual doctrine and comes from taking something that's supposed to be a metaphor literally. And any details about the church that look bad aren't going to be repeated by mormons, so mormons tend not to know about them.