Earlier quoted context omitted.
Who's voice are you using when adding your hand crafted prose? Mimicking the style of the 80% or switching to your own? Perhaps I'm a Luddite, or just in the dissonance phase toward enlightenment, but at the moment I don't want to invest in AI fiction. A big part of the experience for me is understanding the author's mind, not just the story being told
I think there’s only a very small subset of fiction that uses the prose to that extent. Much like code really. If you are writing original algorithms you cannot use the LLM. If you are just remixing existing ones, it becomes a lot more useful. Also, I guess I missed the brunt of your question, though the answer is similar. Most voice works for most characters. There’s only so many ways to say something, but occassion…
And unless reading is your day job or only hobby, that's a massive, massive corpus of interesting text. (In just one genre! There are more genres!) So on an absolute scale, there is so much fiction to read with more-than-surface-level meaning that I personally just don't understand why anyone would have the least interest in reading AI slop.
(I also don't have any real interest in most Kindle Unlimited works, probably for similar reasons. Though I am quite certain there are diamonds there, I've just not had particularly much time for/good luck at finding them.)