That's assuming a certain outcome: indistinguishable posts.

Some would say LLM-generated posts will eventually be superior information-wise. In which case possibly the behavior will change naturally.

Or maybe they don't get there any time soon and stay in the uncanny valley for a long time.

I'm kinda fine with a "if you can't be bothered to even change the standard-corporate-BS-tone of your copypaste, you get downvoted" - for all I know some people might be more clever with their prompting to get something less crap-sounding, and then they'll just live or die on the coherence of the comment.