I'm searching Google trying to figure out what you're talking about but not getting any meaningful results.
Barely literate workers in 3rd world countries then went on a mass "moderation" spree deleting anything that might even remotely be considered controversial
Videos with millions of views were delisted overnight and the associated channels received community standards violation strikes
Did you ever try? There are experts in many fields posting about all kinds of stuff in there, from professional knowledge, to the most mainstream of hobbies, to very obscure stuff.
I suspect you are not looking very hard. I have learned a tremendous amount about everything from stone cutting to metalworking to welding to Kalman filters to linear algebra. There is a lot out there. The main annoyance I have is keeping AI slop out of my feed so that I can instead learn from genuine experts. There is a huge amount out there.