There was never a medical reason for those, only religious. American doctors tried to invent a medical reason, but those are the same doctors who told people that smoking is good for you because the tobacco companies paid them to.

There are some medical reasons (I know from experience) post-puberty, just not for doing it at birth.

Sorry, I forgot to mention that; you're absolutely correct, but that's for a tiny number of people who actually have some medical problem where circumcision is a viable remedy. I meant medical reasons for doing it to all male infants as some sort of preventative procedure.

Pre-puberty here, and as someone that was about 4 years old when my circumcision was done I can absolutely understand how ancient peoples would decide just to do every baby boy on the off chance they’d need it later.

True, during the healing process I had the same thought! Would have been rather more convenient to have just had it done as a baby even if I hadn’t needed it!

That assumes they don't screw up and completely mangle it. That happens from time to time.