I can see both sides. My mom and my older sister don't have pierced ears, but my sister-in-law does. I had mine pierced at the jewelry store my freshman year of college, but that was 25 years ago. All three of my nieces have pierced ears. We have a family friend who is a nurse at a plastic surgeon's office- so that's where my brother's girls went when they were in grade school. My sister's daughter also had hers done sterilely, I think at a doctor's office also. She had hers done in eighth grade. They each were in charge of keeping their ears and the earrings clean till the piercings healed over, and they did a good job. They had them done younger because just about all the girls have pierced ears around here.

If you want to do it, I don't see what the issue is. Or if you want to wait and let her decide when she's a little older.