That's not just false. It's the antithesis of true.

It's not just using rhetorical patterns humans also use which are in some contexts considered good writing. Its overusing them like a high schooler learning the pattern for the first time — and massively overdoing the em dashes and mixing the metaphors

It's true that LLMs have a distinct style, but it does not preclude humans from writing in a similar style. That's where the LLMs got it from, people and training. There's certainly some emergent style that given enough text, you would likely never see from a human. But in a short comment like this, it's really not enough data to be making good judgements.