Specifically because it's convincing. You may just assume everything is fake, that doesn't mean everyone will. You may not care about seeing someone's imperceptibly realistic nude, but if it's depicting them they may care, and they deserve the right for people not to see them like that.
Just because it's not logistically feasible to prevent convincing AI nudes from spreading around doesn't make it ethical
He's a fantastic video game streamer. Very charismatic, genuine, and funny. I think one of the things that makes him special is he'll do ridiculous things for a joke. If he thinks of a funny idea on the fly, sometimes he'll basically stop playing whatever game he was supposed to be streaming, and just do something else stupid instead.
For example, one time he performed a "magic trick" by unplugging his modem and then plugging it back in, using the time in between when the stream was frozen to run out of the room, making it look like he "disappeared". He would do insane, hilarious stuff like that regularly, it wasn't like he had special streams where he did things like that, he did them all the time.
Of course he ALSO did special streams where he went even further, such as the "doll house" stream where he had a whole set made up like a fake house and basically became a Sims character with needs bars and everything. He's a really special guy, and you could spend all day listing all of his amazing feats. He perfectly walks the line between being actually stupid in a funny way, and playing it up as a character, it's convincing enough that it all just becomes "Jerma", but he is also a genuinely good guy.