Pedophilia isn't caused by weight loss. I don't think his weight loss started anything. He would have had the same "interests" whether he was fat or skinny. If he wasn't famous we just wouldn't have heard anything about it.
I tend to agree. That said, there are many people who gain notoriety for non-significant things (Honey Boo-Boo's mother, other reality stars, etc) and people are shocked when they don't handle fame well or the loss of the veneer shows them to be reprehensible (even vile) people. I think that if Jared was not famous he would have been even more of a predator. JMHO.