Well, you’ll never see an erotic film on YouTube, or a war documentary using real combat footage for example, so there are many categories where it’s simply not capable of competing. And even without straight-up banned content, ‘advertiser-unfriendly’ content is aggressively buried by the algorithm, which discourages people from making it, so the ‘quantity’ part might not be true. Some content might be so heavily punished by the algorithm that almost nobody thinks to make it. This is a problem for your position, as it’s not enough for YouTube to win in some categories; it has to win in every category.

sure, but my point wasn't exclusive to them (hence the etc in the first comment). it was just related to any mass media platform, all of them collectively will win. you are right about YouTube in particular though, good point.