I'm training to be a body piercer (NC not new here).
We set our age at 8, maybe 7 if they come in excited with their mums. We won't go younger because it's HARD to keep the kids still, stop them crying etc. Most other piercings we do are 14 with parental consent, 16 with ID, and 18 for genital piercings.
I got mine done at 4, but I hate them. I stretched them, and they're wonky. I wish I'd have had it done at a proper place where they mark it and measure it like I do when I pierce ears.
Tbh, the same as nose piercings, It's a cultural thing. For example I know that certain european cultures pierce their babies ears at 2 DAYS OLD.
I don't like it as it's a consent thing. These children cannot consent to it.
also never take your children to get pierced at claires, the guns can get stuck in the ears.
Infections only happen when you introduce bacteria to the area. You can literally leave ear piercings and they'll heal fine.
YANBU but it's 50-50 on this subject, OP.