1 tim 3:4 says One that ruleth well his own house, having his children in subjection with all gravity; -- so, if his children as unruly and not in subjection, should he then resign?
My point is that the Catholic Church adds a requirement (that a bishop cannot be married) that is not found in scripture. I am not saying scripture requires that a bishop be married, but Paul clearly anticipated that many would be.
As I said, the Catholic Church can make whatever rules it likes for its clergy - as long as it doesn’t try to claim scriptural authority for this one, I don’t care.