I suppose that would make sense if you believed they could have children without being married.
That statement makes absolutely no sense. If there is no requirement for them to be married, but there is a requirement that if they are married that they only marry one woman, then it follows that there is not a requirement that they have children, but if they have children they are required to have them under submission.
The Catholics believe bishops should not be married; you believe they MUST be married. I believe you are both too absolutist on something that the Bible does not declare an absolute position on either way, but does provide specific guidance in the case of a married church leader. I will not persuade you, you will not persuade me, and neither of us will persuade the Catholics. Since this is not an issue on which salvation is conditioned, I guess we will all find out when we get to Heaven who was right...