Yes you got it! The person I replied to was talking about those inline grammar checkers you have in word processors, which are pretty limited in value so I wanted to show what you could do with an LLM, and how it can go beyond just correcting but also helping learning.

I did think about adding a sentence to say to imagine writing in some important official context e.g. a letter to a government agency rather than a comment on Lemmy, but decided in the end it would probably be obvious.