These patterns aren't somehow alien to human speech. It's the quantity. In ChatGPT (and I think it must be ChatGPT specifically) the default writing voice tries for dramatic and profound by dramatically overusing these figures of speech, chaining them together one after another. But they're things most writers use occasionally, one paragraph in ten or twenty. If you're giving a TED Talk or some other elaborate, melodramatic persuasive public speaking role, you might use them one paragraph in four. ChatGPT uses them every other paragraph at least, sometimes multiple times in the same paragraph, so something like a negation comparator or a triplet is present in sentence after fatiguing sentence.

It's trained on the speech of online commenters like us; That's where it's getting these. I'm not gonna change just because Timmy the Zoomer has been with his LLM girlfriend for the past three years and occasionally I remind him of her. I'm not going to deliberately code switch into somebody who doesn't open a new tab to Google things as he talks about them. And you can take my bullet point lists from my cold, dead hands.