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This is remarkably like nyanners' trajectory.
Virtue signaling is an accurate (instead of cynical) description in this case. Many predicted nijiEN would start behaving like this back when it first started but were chided as being paranoid schizos. It is the gradual transition of vtuber as an interactive anime girl, with all its hopes and dreams, to pokimane with an avatar.
Vtubing has always been a mix of the real personality and the virtual. But it's all about the ratio. Notice how the best / most popular vtubers, like Miko / Marine / Pekora, play their characters so well they feel like they're from an actual anime. Have you ever seen Gura engage in these mundane Twitter scandals? They are consummate professionals, who understand the real bits are just the icing on the cake, to make their characters relatable. It's when you put the cart before the horse and reverse the priorities, that you get essentially just twitch women with an avatar.