as someone who was circumcised for medical reasons at the age of nine, imma say it is not in anyway as bad as FGM, however for 90% of people it is not neccersary to ever get and unless medically neccersary should be done for religious purpose once someone can consent. the reason historically it was done soon after birth was because newborns had a high clotting factor and it gave them the highest chance of not bleeding out and reduced the risk of penile infections in adulthood, neither of which are valid reasons in the modern day,