making one dependent on external service is the very point of llm from the point of view of investors. Imagine how much money they will make if everyone just couldnt live without llm in every aspect of their life.

I only did it here to illustrate a point. Typically I only use it on longer posts. I'm not a native english speaker and I often struggle to express my thoughts clearly and I find it immensely useful to run it through AI and see the corrections it made.

there are many use-cases, and you've neglected one: linguistic analysis can be used to identify a person and to link them to other accounts. i'm not saying it's likely or apocalyptic, but it is true and present. using an LLM to "sanitize" your outputs can prevent this.

from a privacy perspective, everyone should do this using a locally hosted LLM. from a person-that-uses-the-internet perspective, i would absolutely hate it if every article and every comment looked like an identical brand of ai slop.

I'd argue that with a little bit of practice its quicker to write a comment and then revise it yourself. Fix the punctuation, grammar, misspellings, and read it through once at least. Its a useful skill to learn as well.