You bring up a good point. Maybe it doesn't matter whether an ai or a person wrote it, as long as it is concise.

And because most ai's are not concise we blame ai's for faults we don't like in humans either: being longwinding

Well, I'd say concision is not the key - sometimes you should be verbose or something else.

In fact, my tendency is to be far too long-winded, with lots of perhaps-unnecessary parantheticals etc. Ai is often shockingly useful at reining me in and focusing on the issue at hand, as well as removing my worst tendencies towards meanness etc...

Im a good writer, when I want to be. But having Ai review, edit, write drafts etc undoubtedly makes me a better writer/communicator. But only because I'm actively thinking about it all, rather than just saying "respond to this" and then providing copy pasta.

You're missing the whole entire point.