Unity itself is not a game; it's a framework, and it can be utilized for applications outside the realm of gaming. Same for VR tech, which is not just for gaming. Most importantly, the performer is not advertising or utilizing it as a game. Interactive virtual environments are not inherently games, and applications like Second Life and VRChat are great illustrations of that. What we're seeing here are examples of virtual environments being used as chat applications, and to me that's absolutely viable.
CB is clearly on board with the concept of virtual cam performers. They've allowed it many times, now, over many years. If we're worried about CB's lackluster record of consistency in stating and enforcing their own rules, in this case, it should be in regards to whether others have been or might in the future be banned for what is being allowed at the moment. Has anyone been banned for using a virtual avatar?