Dunno if the school is a weird outlier, but none of my kid's friends are obsessed with Youtube influencers either.
I haven't banned the kid from Youtube, just didn't specifically direct them there. Except for a few times. I think we looked up sign language tutorials (that was a big deal 3-4 years ago) and some drawing tutorials for watercolours.
I think they see Youtube as a source for information instead of entertainment? At least that's my theory.
Also: I'm not from a native english speaking country, so the amount of content is even more limited. Most of the local YT influencers are 100% insufferable.