Authentic curiosity - does your child not go to a normal school? In my experience you can literally detach your home from the internet and live without electricity, but the second your kids go to school they instantly know all the latest fads and videos and what not. To make it to 10 without being at least somewhat familiar with youtube through that exposure seems....almost impossible?
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.
If anything they'd rather watch the harry potter series 100x times before asking for generic youtube access.