Well, imagine that 90% of the comments on HN are generated and it's very hard to spot it. Would you read them?
The average AI post is likely a carbon copied reddit comment from 2011, that is to say, "no".
The end result is that comment sections aren't enticing to join in on, just read. Which is perfect for ad impressions.
By next week this thread might not have existed at all. The usership of the site likely won't remember it. If I was posting half the content on this site and then stopped and was replaced by another username, would anyone notice? It seems like there is no real community to be found, we've destroyed our own habitat.
"Does it matter what anything innately is, beyond the effects it has on you?"
For example: Suppose you were given a human companion with a robot brain that was your ideal friend. They made you laugh and you enjoyed every moment you spent with them.
Does it make it any less impactful/genuine to you that they're not a "real" human, or is your felt experience the only meaningful end-measure?
For me, it's the latter.