>Telling an LLM to "refine" your writing is just lazy and it doesn't help you learn to express yourself better. Asking it for various ways of conveying something, and picking one that suits you when writing a comment is OK in my book.

To me those are the same thing excepting the number of options given to the human...

The act of choosing something requires effort, and is an expression of personal style. This is way better than handing it all over to the model.