Being married has not necessarily strengthened Protestant churches. In fact, it has destroyed some congregations. I've heard stories of churches splitting apart over a Pastor and wife getting divorced. That's unscriptural. There are churches that have ministers that have been married twice or more. Neither does marriage bar a pastor from being morally corrupt.
Marriage isn't a drawing factor either lately in getting Protestant ministers. I've read that fewer are signing up to be ministers these days in your churches as well. Some leave over burn out due to stress between laity, their own family, lack of money, etc.
A Protestant friend of mine complained that when they needed their minister desperately one day he was too busy with his family to minister to them. Reminds me of when St. Paul said that a married man was more concerned with how to please his wife, and the unmarried more concerned with how to please the Lord.
I like the fact that our priests aren't married and they devote their entire life to service their parish and they tend to the flock of God.
And what do you think is happening to the Catholic Church when priests are sexually molesting minors? And what do you think is happening to the Catholic Church when all the leadership does is move offending priests around just to do it again in another congregation rather than report it to law enforcement because they believe, unbiblically, they are immune to following local rule, ie., Romans 13:1?