"If gays are open about their sexuality, there is very little chance they will be molesters. "
See the recent Kaitlyn Hunt case. If people think there is nothing wrong about homosexuality, they act on it and then claim they have done nothing wrong, including when molesting and exploiting children for sex.
Of course, on the Internet, they all say they don't. But reality is a very different matter.
And unless you have been inside Sandusky's head, you have no idea if he is "heterosexual."