Getting it done as an adult is fine. You consented. I'm also fine with piercings or tattoos on adults but not on babies for the same reason. Though that's a bit of a false equivalence as genital mutilation is more dangerous and less reversible than those other two, so I guess I find them less objectionable, though still fucked up.

Getting it done out of medical necessity is also fine, for pretty obvious reasons.

Forcing it upon a baby for no reason isn't.

Have you noticed any loss of sensation compared to before the procedure?