Most of the views to people who do YouTube as a job. When you look on that trending list, 90% of those videos are people waking up and going to a job. The last thing they want is more bosses and more logistics.
They usually join networks more out of necessity than choice (from memory you get access to more "perks" if you're with a network). Many YouTubers bemoan the existence of multi-channel networks because they take a lot of power away from content creators (even more than YouTube already does).
> When you look on that trending list [...]
These days it's pretty obvious that the trending list is effectively all paid promotions. It's not uncommon that content that has already gone viral is nowhere near the trending list (and the trending list is instead videos advertising new movies). In the "old days" of YouTube, the front page was hand-selected content that someone working at YouTube thought people would enjoy. These days it's all run by opaque algorithms.
> The last thing they want is more bosses and more logistics.
Given how many YouTubers are complaining about their current bosses being completely awful, I'd think the last thing they want is to continue with the status quo.
Oh boy. Bees are looking for badgers?!
Content creators are looking for support and high reliability. "The middleman" can sometimes deliver those things... Until they suddenly boot you out, because their algorithm determined, that your videos don't deliver enough bucks in advertising revenue to keep them afloat.
Of course, "the algorithm" is merely poor excuse for carefully orchestrated scenario, which might have as well resulted from manual intervention (and most famous precedents are indeed backed by staff-approved decisions). Google have put great deal of effort into pretending, that their services have no support teams and no living humans behind them, but in practice places like YouTube are censored to hell and back, — and all of that censorship happens at expense of "content creators".