That is exactly the point of the ruling, though... they are saying that AI summaries are NOT the same as search. If Google was just returning search results, and then users clicked on a website and read the content there, Google is not responsible for the content.
If instead Google gives you an answer right there on google.com, without going to another site, they ARE responsible for it.
That makes sense to me?
why? tons of websites push misinformation intentionally. is there a truth requirement anywhere? i don’t get why this is a thing at all
Not precisely. The issue at hand isn't just that Google displayed the AI summary, but that they authored it, making them responsible for its contents. If the defamatory content had been in a snippet in the search results, they would've been fine, because that clearly has another author who can be held responsible. The AI summary has no other author than Google; therefore, they're responsible for what it says.
(What's the alternative, after all? Having no one responsible for what the AI summary says is clearly untenable.)