I don’t think having a ML-backed proofreading system is an intrinsically bad idea; the oft-maligned “Apple Intelligence” suite has a proofreading function which is actually pretty good (although it has a UI so abysmal it’s virtually useless in most circumstances). But unless you truly, deeply believe your own writing isn’t as good as a precocious eighth-grader trying to impress their teacher with a book report, don’t ask an LLM to rewrite your stuff.
What is a writing "voice"? It's more than just patterns and methods of phrasing. ChatGPT would say "rhythm and diction and tone" and word choice. But that's just the paint. A voice is the expression of your conscious experience trying to convey an idea in a way that reflects your experience. If it were just those semi-concrete elements, we would have unlimited Dickens; the concept could translate to music, we could have unlimited Mozart. Instead—and I hope you agree—we have crude approximations of all these things.
Writing, even technical writing, is an art. Art comes from experience. Silicon can not experience. And experiencers (ie, people with consciousness) can detect soullessness. To think otherwise is to be tricked; listen to anything on suno, for example. It's amazing at first, and then you see through the trick. You start to hear it the way most people now perceive generated images as too "shiny". Have you ever generated an image and felt a feeling other than "neat"?
Just ask it to write "in the style of" a few famous writers with a recognizable style. It just can't do it. It'll do an awfully cringe attempt at it.
And that's just how bad LLMs are at it. There's a more general problem. If you've ever read a posthumous continuation of a literary series by a different but skilled author, you know what I mean.
For example, "And another thing..." by Eoin Colfer is written to be the final sequel to the Hitchhiker's Guide, after Douglas Adams died. And to their absolute credit, the author Eoin Colfer, in my opinion, pretty much nails Douglas Adams's tone to the extent it is humanly possible to do so. But no matter how close he got, there's a paradox here. Colfer can only replicate Adams's style. But only Adams could add a new element, and it would still be his style. While if Colfer had done exactly the same, he'd have been considered "off".
Anyway, if a human writer can't pull it off, I doubt an LLM can do it.
This is why heavily assisted ai writing is still slop. That fundamental learning that is baked in is gone. It is the same reason why corporate speak is so hated. It is basically intentional slop.
That's no crime, so far. It's very normal to have writers and editors.
But it's highly abnormal for everyone to have the _same_ editor, famous for the writing exactly the text that everybody hates.
It's like inviting Uwe Boll to edit your film.
If there's a good reason to send outgoing slop, OK. But if your audience is more verbally adept, and more familiar with its style, you do risk making yourself look bad.
Personally I'm not submitting enough stuff to an LLM to give it enough to go on.