Ironically this post comes across to me as written by an LLM. The em-dashes, the prepositions, the "not this, that" lines. As a college instructor, I can usually tell. I put it through GPTZero and it said it's 96% LLM written. GPTZero is not full-proof but I think it's likely right on this one and I find it very ironic.
Unless the author had live-streamed the writing process, how could we know? Humans have been exposed to LLM generated texts on nearly all channels for more than three years, so by now it would be a surprise if there had not been a reciprocal reaction. Writers imitate what they read, the tools we shaped might have started to shape us.