The thing is, you (we) only identify chatGPT generated content when it has that generic voice. Maybe there's a lot more generated content here, but it isn't so obvious. It's a selection bias, we see mostly what's easy to see.
I don’t think this voice is emergent, it learned this from its training data. If you gave me a video game review script written by ChatGPT and another one written by Ganeranx, I doubt I’d be able to tell the difference. They both have a style of just vaguely referencing lots of different things that different people have said without really saying anything at all or offering any concrete opinions.