Chopping bits off kids - who can't even consent to bits being chopped off 'em - should be wrong - from the get-go - whether it's a foreskin - or the whole banana - the kid can't make a proper decision for itself like that - till it's fully grown - has mental faculties - and physical attributes of an adult - not till then - not till it's old enough - to know exactly what's going on - and any implications considered seriously -That's a good question.
Something commonly practiced like circumcision was / is so normal parents hardly give it any consideration and just go along with it, "everybody does it, we don't want little Johnny to feel weird because his penis looks different than his dads".
The mother of my children (3 boys, all in their 30s now) worked as a nurse when my kids were born and I was busy working lots of hours, and more or less let her make our family medical choices. They got circumcised and I didn't think much about it then.
If it were today and I was a young father I might reconsider.