My English is fine, and I did hand-write my MSc thesis in English, but scientific style writing is very tedious. Personally I don't think I'd even consider writing a paper "by hand" if I were to write another one.

There really is no point, as long as you verify the content matches your intent and edit out anything poorly written.

Frankly, I've read plenty of papers by native English-speakers over the years that'd strongly benefit from being rewritten by an LLM too...