And they don't. If you didn't attend their Vtubing Academy, which is Japan-only (and closed right now), they don't offer any sort of training nor they have the personnel or the facilities for that. You wanna do something? It's from your own pocket. Even if you consider the AR live, it's clear the talents had barely any kind of dancing or vocal lessons.
Hell, Vox was streamming sub 1K around the same time. Vox. Which at one point was reaching 60K CCV and rivaling GURA of all people. Now have returned and is reaching indie rookie numbers. For a guy that used to be their golden goose, this must be fucking with his head HARD, cuz Niji only invests on talents that manage to deliver by themselves. He's now one of the crowd, and he knows this. Next fuck up, it's his head on the chopper.