Because YouTube is already known as one of the worst cancers on the internet, and has allowed the stupid to herd and multiply.

Flat Earth. Pizzagate. Soros conspiracies. Chemtrails. Anti-vaccers. These were all laughable fringe things that the disturbed came up with. Then YouTube came along and suddenly the stupid were discovering one another, confirming each other's idiocy.

YouTube is probably a little tired of this. The fringe can of course create their own video sites, just as they made their own "Twitter" and their own "Reddit" (all abysmal failures when they learn how miserable and deplorable they are).

LOL, dang -the enabler of right-wing asshats- has hellbanned me. ROFL. Eat a big ol' donkey dick, dang. You have turned HN into a AGW denying shithole.