I think there's a danger here of conflating gay priests with priests who are sexual abusers. I can quite understand why a devout gay man who is a Catholic might well decide that the celibate life of a priest is a good way of trying to repress his sexuality.
However, I don't think that being a sexual predator or abuser is a sexual orientation at all. It's about power relationships, to my mind.
We're talking at cross-purposes. So let me retrench to explain, with greater clarity one hopes, what I was trying to say. Which may or may not dovetail with discussions above. I jumped in with flat feet, which may have implied associations I didn't intend.
The Church -- by its requirement of celibacy -- offers a screen for many different kinds of sexual non-conformity. By the time a young man is old enough to enter a seminary, he most likely is already aware of, or energetically hiding from, his differences. Those traits which make him socially awkward outside the Church, can be traded in for a respectable and even lucrative career inside the Church. This is true for gay men, but for many other shades of sexuality as well, including a true pedophile (attracted to prepubescent children). If you feel odd, fear that you can't integrate into socially approved heterosexual relationships with adult women, the Church has appeal. And if you're turned on by power, I could argue that the Church offers that promise as well. If you've been raised in a Catholic community, the power wielded by clergy is palpable.
So you take this motley assortment of sexual "deviants" (as defined by Catholic society) and you place them in an intense, hierarchy-driven atmosphere of male privilege. You hand the high-achievers power and authority over others. You surround them with sycophants. You surround them with young men and teenage boys. This dynamic alone would breed sexual abusers and predators. Principled men may resist the temptation to abuse their power, but as we're learning, many others do not. Men who "like them young" but post-adolescent are not synonymous with child molesters. That is entirely another creature.
People of otherwise benign character can be transformed by the institution around them. Absolute power corrupts. No matter what a particular man may find sexually arousing, having the power of the Church gives him the opportunity to indulge himself, without consent from others, and to get away with it.
Eliminating the rule of celibacy dilutes the pool of clergy with unresolved sexual issues. It breaks open the claustrophic male-only bubble and brings a more diverse community into the halls of power. It does not eliminate sexual predators -- as we see from other religious institutions -- but it helps to bring a little more light into dark corners. It also frees celibacy rule-breakers from being bound by fear of their own exposure, makes them less willing to cover the horrific crimes.