Earlier quoted context omitted.
Google appears to be still allowed to surface content which is defamatory, but they still have a publisher's duty to remove it once notified, I think this is key from the summary (linked elsewhere in the discussion): > […] because [Google] was on notice that the material was defamatory and refused to remove the information, it could not be found to have innocently circulated the information
I don't think it's reasonable for Google to remove content whenever someone just says its defamatory, in the absence of a court finding that it's actually defamatory. Otherwise we'd quickly lose every reference to Biden winning the 2020 election once it was widely known that the rule existed.
There is a world of difference, legally, between disparaging a powerful politician like Biden and a normal private person.