It depends on the purpose of the reader. I can learn a technical topic from an LLM but not what another person genuinely thinks. I certainly can't convince it of anything nor befriend it.

I mean there's lots of room at the bottom. but part of the reason LLM slop seems to me so objectionable is its sameness; it's obviously drawn from the same thin manifold of the language. A human articulating their own thoughts, however those may be rendered on the page, at least realizes their own idiosyncratic region of the language. Writing one's own thoughts in one's own words declares the existence of one's own language, consonant with but distinct from all the others. Asserting one's individual voice and style, even if the content is worthless and the aesthetics objectionable maintains diversity in face of the LLM monoculture. We lament the lost apples, even the bitter ones; we don't ask the birds to each justify their differences.