I believe we as humans should always strive to be a better version of ourselves, English improvement is not an exception, and I don't think BTT should take it away from us. I've been improving my English for years as an editor and book writer,
I believe anyone would be able to tell between user whso gradually improves their English over the years and one which suddenly moves from below average to perfect use of English. Self improvement is not being taken away from you.
It would be ironic for one to rely on a machine to detect machine generated text. You should not feel hard done if a machine adjudged your post to not be 100% human generated, it's a tool and could have flaws at times.
You can drop your reply in that thread since the discussion is ongoing