No one is saying what you think they are saying.  No one has a "right" to the priest, not even a man. All that is argued is that  no one should be barred from the priesthood simply because he or she is not a straight man, as though that were the only category of person that God might call.  There are ALREADY plenty of homosexual men in the priesthood, all doing as well or as poorly at it as straight men, so that argument is shot down to begin with.

Barring women or gays from the priesthood simply because they are gay or female is no different than barring a woman or a man from being a nurse or a teacher, or a lawyer or an engineer.  One's gender has nothing to do with the skills and aptitude needed to do the job. And God calls whomever God wills.