Pedophilia is a mental condition, much like homosexuality. They don’t choose to be one, they know it’s wrong. I bet there are plenty of closeted pedos (i.e. don’t act on their urges and trying to lead normal lives). The only difference is that homosexuality occurs between consenting adults, and doesn’t hurt anyone except for the sensibilities of some righteous pious {profanity}, while pedos hurt innocent children, which is fucked up.
tl;dr some pedos are (very) bad for acting on their sexual preferences, they aren’t bad for having them. Taking this conclusion a bit further - making child porn is obviously abhorrent and one of the most heinous crimes I can imagine along with rape and murder, but watching these movies once they are made without profiting the perpetrators, isn’t so morally depraved. Especially if it keeps the urge to rape a child at bay.