“Deep-seated homosexual tendencies” to me would mean that all sexual expression would be homosexual, never heterosexual. (Obviously some people can be attracted to both sexes – the “deep-seated homosexual tendency” would eliminate all heterosexual attraction and thus any heterosexual expression.) It certainly doesn’t mean that a person described above is incapable of living celibately.
Celibacy is a commitment made through the action of grace (and often within a vocation), whether it’s made by a heterosexual or homosexual person, and has nothing to do with sexual orientation.
True, it may be a bit more difficult for a gay man who is surrounded by men in the seminary and later within the all-male clerical culture, but it’s the vowed commitment that will provide sufficient grace to withstand spontaneous attractions and acting on those impulses.
Once a priest is ordained and working in a parish environment, or teaching in a coeducational college – or wherever he happens to serve, except a cloistered monastery, he will be in contact with women of all ages. The commitment he’s made as a heterosexual priest will provide sufficient grace in those situations, too.
According to my best friend, who happens to BE a heterosexual priest nearing retirement age, part of the problem with the Church’s handling of the first abuse cases to be revealed was the charity it had extended toward the offending priest. Of course, that charity should have also been shown to the victim and his/her family and the accused brought to civil justice – no argument from me on that – but my friend’s point was the Church rightly did not throw the accused to the wolves out of concern for its own, particularly when many accusations hadn’t been proven. (That point is certainly arguable, but I’m just the messenger. I personally abhor the Church’s actions, but I understand what my friend is saying.)
Priests aren’t meant to be “rooted out” if they live their vow of celibacy and serve the Church and God with honor, according to their vocation. Candidates for the priesthood, if they have met the Church’s current very strict guidelines, are not to be “pulled up” either.
The Church asks every unmarried person, gay or straight, man or woman, to live celibately… some can, many can’t, but one’s sexual orientation is not the driving factor in celibacy – it’s the commitment made through grace, and I assume a bigger scoop of grace when accompanying a vocation.