The issue is that even the people who are producing what Google wants are less likely to do so if they fear Google could screw them over on a whim sometime down the road with a few lines of code to tweak their algorithms, a new ToS Edit, or a new interpretation/enforcement of vaguely defined existing ToS terms. All their investment. All their hard work. All their planning for the future. Google actively courts content providers and said content providers have a right to be upset if they put their eggs in that basket at Google's insistence only to have the rug ripped out from under them.
As it is, lots of long-term science, review, and debunking videos are being hit hard by SJWs who just want to go on believing ignorant things. They flag, Google assumes it's controversial, and the video gets demonetized automatically. They appeal, Google points to their vague ToS and hides behind something vague and nebulous, like "offensive content" (some people are offended by the truth).
RedLetterMedia, EEVBlog, Nostalgia Critic, Thunderf00t, and so many more have these issues.