Well, yes I am.
Would you allow your child to dye their hair bright orange,via bleaching?
Probably not.
It's about making permanent/big body changes.
Why is one okay,and not the other?
Seriously, if you'd never heard of piercing and someone came up to you and said "hi, shall I put a needle in your child's ear to make a hole, so they can wear a piece of jewellery, that you will have to clean and maintain for the next few weeks, in order for her to look pretty. Oh yes, it will hurt a bit. And yes, she'll have to cover it up for sports and whatnot, but at least she'll look pretty".
Wouldn't you think that madness?
Would it be okay for your 6 year old to get a belly button piercing? Tongue piercing?
If not, why not? What's so different about ears and belly button?