The only one of true Twelve we know was married was Peter. The New Testament is totally unconcerned about the question. It makes allusions to people about whom we know nothing more than their names.
As for ending the problem of the homosexuals among the clergy, that is doubtful, if only because sexual problems do not end with marriage.
Ok, fair comment.
But the criticality of affirming the importance of the Family Unit, overrides all other considerations.