Maybe, but as I stated in my post, there is no lasting pain or visible, disfiguring scarring. You can't tell me having a mole taken off or a tooth pulled doesn't hurt - you don't get those back, either, and sometimes those operations are performed for purely aesthetic reasons (not even religious). They run the risk of chopping off a part of your gum or your skin, but in the long most people don't even remember what the old tooth or mole looked/felt like. Why is this different?Lots of nerve endings there. I can't say the same thing about pubic hair or a mole. Especially since pubic hair comes back.
As far as doing it when you're an adult, that's your choice. I can't imagine why you would, but I wouldn't support stopping you from having control over your own body - and if you're converting to Judaism, it is a requirement.