that's precisely the objection most people have whether they realize it or not.
slop just means "I don't like this style"
when AI writes more reliably in a way that people do like, they will stop calling everything AI does slop.
I think you are forgetting about the decency and dignity part of "respect".
Yes there's a quality component to the role of communication in how it respects other people.
There's also honesty, transparency, truth and vectors along the dimensions of "Are we claiming and presenting the truth or are we bending facts and creating impersonations and warping reality?" Most AI is used for the latter today: people are having AI's write their words and speech for them and then the AI says things as though it were the human like "I said xyz" when the AI is NOT the human who did those things. That's lying and deception and disrespect to the reader.
I may complain that I don't like the way a sleezy con man talks, and I may be able to detect his communication patterns, but that doesn't mean I want the con man to speak in a different way I can't detect as sleezy. I don't want to talk to the con man.
Obfuscating LLM output to trick the reader into thinking it wasn't LLM output is not respectful.