i dunno i can think of plenty of advantages. Horrible ones but still.The dumbest part too me is that there's no reason to ever hire a minor to be a VTuber. There's just no way it can be of any advantage and many many ways for it to be a problem. Even if you did everything to make it safe and supervised, you really would be better off hiring an adult woman. For youtube, in general they want to get rid of anything with minors that could be considered sexualized as long as it's been flag'd enough. They won't do shit proactively, and of course somehow there are some large channels that are basically TNA try on hauls with Minors that persist seemingly without problem.
the pedo crowd does tend to be rich and autistic.
there is the notoriety boost hate watches are still watches and the twittards will keep bringing it up for at least a few days.
there could also be unforseen advantages as well like she works for free or cheap because shes too young to understand a contract or even just hope shes stupid enough to violate said contract so they can hit her with penalties.
an lastly theres the ever popular "they offered me money of course i hired them" especially plausible since certain retarded parents will infact do anything to get any attention including forcing their kids on camera.