I wouldn't trust a baby to not fiddle with their earrings, cleaning might be a difficult etc. And then there's the whole business of an infant not being able to say whether or not they want them done, the pain and having to hold a squirmy baby still while it's done.
I also cannot fathom a single reason to pierce a baby tbh, when they're old enough to fully weigh the risks and benefits, that's old enough.
What are your thoughts on this?