It’s a personal failing but it doesn’t indicate a betrayal of beliefs.
Jerry Lee Lewis studied at bible school. He still believes even if he doesn’t live up to the morals (and he does feel regret).
There was a documentary I saw on Amish youths in their period of “free wandering”. The filmmakers couldn’t understand how even if the kids didn’t return to Amish society (couldn’t abide by it), even when they engaged in sin and liked it, that they still held a belief in a God that may not approve of their actions.
Oh I think I get it.
There will always be private sins that do not scandalize a congregation. It’s when a sin gets notorious that it can scandalize a congregation.
As I said I hope he makes a comeback, beating not just his past porn habit, but helping others beat theirs too, understanding the evil better than before. (Harmless as doves, wise as serpents.)