Yeah, I can't figure out where this "voice" comes from and it is so impossible to get rid of. It is so grating.
I asked for hemingway in a planning document one time and the result was highly amusing to everyone. "We will not wreck it with small greeds." was an all time favorite for me.
So no matter how good or thoughtful the writing is it gets tiresome.
LLMs have a bunch of tricks for dressing up their infodumps, but they are almost purely infodumps, and no real opinion comes through. There's no sense of more importance to one statement or the other, it's all monotone (and usually over the top.)
Their writing was already painted into this corner long before the LLM epoch and they continue to publish more than anyone else.
Man generates text.