LLM content immediately distracts my attention to the fact that it is LLM content, and I focus immediately on that "meta" issue to the exclusion of whatever the content is.

And generally I find that the content isn't that high quality. You're getting someone who superficially appears like an expert and looks like they've thought through the problem, but if you know anything about the problem, you'll find that the articles are usually weak (Gell-Mann Amnesia).