And since when has this dead horse not been recently beaten?
It is a discipline, not a matter of faith. And it's not closed; married men are being ordained every year, some Catholic, some Protestant converts.
I'd wager a very large sum that there is a great deal of support for optional celibacy among the bishops of most countries, no matter what public pronouncements they make.
Even Dolan, who's as orthodox as they come, sees no problem in priests advocating the discussion of celibacy.