People had a better conceptual model of what results on the SERP were: Random websites.

If I ask ChatGPT "Did X do Y" and it responds with bold text "Yes, X did Y on this date, which was reported on the CBS Evening News" but that whole thing was just sourced from one webpage. Even if there are footnotes, people today are treating that with greater weight than some random crackpot having a blog because to them, "ChatGPT is telling me so" not "ChatGPT is listing websites that seem to mention that." Likewise with the garbage information that pops out of the "AI Overview" -- it really looks to the naive user (which is at least 50% of the Internet audience) that Google is telling you a fact. This part especially, I attribute to what AI Overview's real estate on the page was taken from: That spot used to show deterministic facts, like unit conversions, or extracted exact text snippets from a small set of basically reliable sites, like IMDB, or like, whatever a reliable and direct source is for population of a city. People learned that if you type into Google "how many Tbsp in a Cup" it answers you with that fact in bold at the top of the page. So the things presented today are being presented in a place people were primed for a decade to believe was a deterministic fact zone.