That is true. But you also have to take into account those who were abused and are now gay. I don't think the abuse alone made them gay, but it probably pushed them in that direction when they weren't 100% sure to go that way. So the abuse didn't cause the homosexuality, but in some young people it does have an influence.
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Homo sex is a behavior that has to be learned.
Some learn to enjoy it, while most just learn to live with it.
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There are some men who were abused as young boys who end up gay. Those who were abused around puberty, though, may have been more attracted to men anyway and might have longed for the adult male romantic attention, the same way a 13 year old girl thinks the 25 year old man is in love with her. Hard to tease out those two differences.
By far most men abused by priests still end up heterosexual as adults. Because they were.