Your friend had medical indication I guess? That's a whole other story, that's not "mutilation" but "the best in the given situation according to medical science".

Medical science is very clear about both male and female genital mutilation: lots of risk and potential harm, not real benefits.

And this does not grow back like nails and hair. It's not a fashion. It's literally putting a knife in your baby because some old culture prescribes it. No problem with that: just do it when the kid reaches the age of consent.