As a long-married and happily-married man, can I just mention one other benefit holy matrimony could bring a priest, if the Church ever decided to revise its current discipline.
A Church of England wedding service lays out three purposes of marriage: to provide for the birth and bringing up of children; to allow “the natural instincts and affections, implanted by God” to be “hallowed and directed aright”; and, thirdly, “for the mutual society, help, and comfort, that the one ought to have of the other, both in prosperity and adversity.”
I can bear witness to this third purpose, to the strength that this mutual society, help, and comfort brings. I am quite sure I would have been a much smaller, weaker person without it. It is not for me, of course, to say whether such additional strength would be of value to a priest.