Priestly celibacy has its advantages even today. I read an article a few months ago about how various clergy members carried out their duties in Eastern Europe during the Cold War. The article made a very interesting point -- the members of the Eastern Orthodox clergy were able to resist the Communist governments as well as the Catholic clergy was, but once these governments started pressuring their families the Eastern Orthodox clergy abdicated in the face of the pressure.
As a result, the Catholic Church in Europe became the sole pillar of strength against Communism after World War II.