I don't see anything wrong with it
My older two daughter's who are 14 and 10 both have their ears pierced but they asked and are able to take care of having their ears pierced themselves. My youngest daughter is 3 and she doesn't have her's pierced yet. I won't allow any of my boys to get their ears pierced.
I never understood how people could pierce their babies ears until I made good friends with someone and they are full mexican and they pierce their little girls ears when they are babies as a tradition and a cultural thing and it seemed kind of cool..
I think you're right.. if they can take care of them and keep them from getting infected, then sure.. why not.