Not all values of "equally good" are equally good.

Writing has rhythm, or at least it's supposed to, and synonym swapping compromises it.

Never mind metaphors and similes, which are even more tightly constrained.

LLM writing is still a long way from good. Sometimes you get lucky with the odd line, but there's a difference in quality between influencer slop, genre fiction, and literary fiction and/or best-in-class journalism.

LLMs are still somewhere between the first two, and nowhere close to approaching the third.