General note:
Let's remember the new rules here folks. It is my hope that Catholics will set the best example for all to follow. I know things have been rather tense at times. But, I for one will be posting with my safety on and trigger finger outside the guard.
Celibacy is a tradition, though how long-standing is subject to debate. It was not an absolute requirement (meaning ordination in the Latin Rite was illicit if a man were married) until the Council of Trent. Most historians agree that celibacy was mandated in the 11th century. There were decrees as early as the fourth century, but observation of the actual discipline was not universal among the clergy.
Christ was celibate, but there is no evidence he made its observance an absolute requirement for his apostles and disciples ("Let him observe it who can.")
Theologically, celibacy is not essential to the priesthood.
While celibacy has some witness value, it's clear that Latin Rite clergy (permanent deacons and married Protestant converts) can also provide witness value as married men.
Whether or not celibacy should be mandatory for Latin Rite priests should be discussed, thoroughly, at all levels in the Church. Pretending that there is no issue with it is not going make the fact that there is an issue go away.