I guess you've never read the English of a Dutch person ;) During my PhD defense I was told I "should have checked with a native speaker." Pre-LLMs, I'd go to my American colleague and she'd mostly remove text and rewrite some bit to make texts much more readable.
Nowadays, often I put my text into the LLM, and say: Make more concise, include all original points, don't be enthusiastic, use business style writing.
And then it will come with some lines of which I think: Yes! That is what I meant!
I can't imagine you'd rather read my Dunglish. Sure, I could have "studied harder", but one simply is just much more clever in their native tongue, I know more words, more subtleties etc. Over time, and I believe due to LLM use I do get better at it myself! It's a language model after all, not a facts model. I can trust it to make nice sentences.