Fear of ear piercing guns is actually reasonable, knowing that the process can be painful due to the needle being not sharp enough, as well as doubted needle sterility. Girls' worst fear!
I know people with at least two or three tattoos that are afraid to be vaccinated because they are scared of needles. Fears are irrational after all.
That's what pops in my mind when I imagine things about anti-vaxxers' funny double standards. Can't expect such a tough-looking female character like Ran to look so nervous upon seeing a piercing device. Downvote as much as you like, disagree with. Thank you.
Updated
Had never put on anything that's not a clip-on because she's scared of having her ears pierced.