AI-generated content seems similar. If a comment is good, who cares whether it was written by Alice, Bob, or an AI? ChatGPT has already proven it can write better answers to some queries than most humans do; I'd rather read the better-quality answer, no matter who wrote it. I'm on HN for the comments, not the people.
(It says "From the ChatGPT-generated stuff I've seen just in the last week, I think we're already there. Most humans these days are incredibly stupid.")
I have read low quality internet comments saying "people are dumb" over and over and over, year in, year out. I argue that wherever they are, they have no inherent positive value. And negative contribution to the internet, the world, the thread they are posted in.