Yes, it might be misinformation, but it's convenient misinformation, is that the idea? And yes, it's true that a source like wikipedia could be too, but that has to withstand scrutiny to remain on the site, no such checks or balances in AI.
What value does a link to a source that's not held to any standard to be informative do? Seems a waste of everyone's time to me.
However, I also think it's valid to question what it adds to a conversation if someone is quoting it verbatim. Would we be happier if HN was like Quora and automatically added an AI response to everything?
That or I must be a lot more LLM-accepting than most of HN.