A vasectomy is, as far as I am concerned, at worst morally neutral. In my case, it was morally good. As I said elsewhere in this thread, my wife's doctor told her that another pregnancy would almost certainly kill her. So I had the operation to save her life. It was either that, or give up our sexual relationship for the next twenty years or so, until she reached menopause. If you are going to say that we should have done the latter, I would suggest that you say something realistic.