It can support writing practice when you use it for specific feedback and make the final choices yourself. Asking where a paragraph is unclear can teach you more than accepting a complete rewrite without understanding what changed.
Write a short draft, ask for one or two suggestions, and decide which ones improve your meaning. You can also compare versions for tone or structure. Keep factual claims grounded in your own material. Over time, notice recurring patterns so the assistance helps you develop judgment you can use without the tool.