If someone intentionally conceals the fact that they're a pedophile, they must on some intellectual level understand that society would frown upon that. That would indicate that they're not hapless victims of circumstance.
Could you make explicit the logical connection between your two sentences?
It would be something like, "Possessing an intellectual understanding of society's disapproval of an action means you cannot be suffering from an irresistible compulsion toward that action provoked by a brain tumor because ________."
"If you can keep your head while those around you are losing theirs, you can collect a lot of heads."