"I just used it to clean up my writing" seems to be the usual excuse when someone has generated the entire thing and copy pasted it in. No one believes it and it's blatantly obvious every time someone does this.

Not sure what you're talking about. Quite often I've written out a block of information and have found chunks of repeats or what would be hard to interpret by other stuck here or there. I'll stick it in an llm and have it suggest changes.

Simply put you seem to live in a different world where everyone around you has elegant diction. I have people I work with that if I could I would demand they take what they write and ask "would this make sense to any other human on this planet".

There are no shortages of people being lazy with LLMs, but at the same time it is a tool with valid and useful purpose.

Sometimes I ramble for a long time and ask an LLM to clean it up. It almost always slopifies it to shreds. Can't extract the core ideas, matches everything to the closest popular (i.e. boring to read) concept, etc.