When people talk about "having" children it means that concieving one and raising them successfully.

If you as a man have children at 50 you will most likely have a hard time raising them for various reasons such as: a)your declining physical health b) your declining mental health c)higher probability of passing bad genes at 50 (this i do not know for sure)

Stop being deluded and think you as a man are superman or untouchable. You are not. People who make you think that is because they want to sell you products. Do not be a fool.