In most cases, well publicised censorship of art backfires and provides more notoriety and fans for the artist.
Youtube doesn't care. It can't have antivax stuff on their platform because advertisers don't want their ads on controversial content.
Further, videos are not outright banned on behalf of advertisers, only demonetised. Also, whether you agree or not, there would be advertisers who wish to target this audience. There isn’t a shared moral code that all advertisers abide by.
Somethings very wrong when advertisers are acting as content moderators.