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@Rocketleaguer said, Youtube's guidelines got so strict that anybody who wanted to make money on Youtube had to lose any and all personality they had so they could stay monetized. All of the top tier youtubers have congealed into a singular amorphous mass with little to no distinction between each other in regards to content or opinions.
They also all moved to Los Angeles, an already soul-corrupting city, combined with a global internet social climate that's only gotten more and more sensitive, bitter, and unfun post 2016 election. Now they're all super desperate to distance themselves from the days when they used to actively make jokes that could offend and took social politics less seriously by taking down the few "edgy" creators that are still around, like Sam Hyde.