Another thought: Or might it finally happen that we see the effects of an over-saturated market for content? For some time, the content creators were able to squeeze some more money out of content by thinning it a bit, lowering the quality of the content, recycling other content of other people to make "react" videos of them, etc.
But only a fraction of them was giving good and constant quality, AND were able to see youtube and other channels like tiktok as means to draw people to a sustainable product they could sell, like chefs promoting their cooking books and making money off of them- or like Dave by selling multimeters and Gizmos like the µCurrent.
And after all: The last word in how a platform is to be run have the big advertising companies that pay for the opportunity to have their ads being pushed to the videos, and they demand some quality of clearly assorted and defined audience as not to waste their precious money to the wrong target audience. (Like promoting the newest burger of a fast-food chain on a channel targeted to vegetarians or people that live in an area where the next burger joint is far away...)