I think it's a very good reason.
Is having 5 babies (male or female) with 4 men or women a reason for a doctor to strongly recommend on each visit a vasectomy or tubal ligation?
Time to cut something
I'd say that it's a darn good reason for a woman to never procreate again.
Considering it is a woman tha actually gives birth .. guess that would depend on the dynamics of what the mother had to offer her offspring. Is she able to provide for each child fully and provide a balanced life? Whether it's one child or many makes no difference. They all deserve a good life. .. Or is she becoming pregnant due to irresponsibility and has nothing to offer emotionally or monaterily.
If however, a man is being irresponsible by impregnating many women (by accident) because he won't take 'precautions' .. Of course his irresponsibility is detestable and deserves someone making such a logical suggestion to get "fixed". .. For the same reasons
Even as a man, I'm thinking a surgical double orchiectomy.
This guy does not understand his sexuality at all.