In my language, I say HN does not "promote" content because the view for me is substantially the same as the view for everyone else. Contrast that with YouTube, where Google's algorithms elevate content specific to individual users, thus leading me to conclude that Google thinks I "should" watch the content. I would argue that far more than automated filtering, signals from other users, and human moderation goes into YouTube's recommendations -- particularly a calculation of the revneue to Google of you watching the video.
But again, this concept that Google "promoted" the content that harmed the plaintiffs and should thus be liable for that action is the heart of the case, not that Google should be liable for the content itself.