I think we can leave this one. HN's goal is to gratify curiosity. That isn't best served by spelling everything out, so it's ok to have a vague title or two.
Clickbait also is based on whetting curiosity.
I'd rather have a descriptive title so that I knew what lies ahead, than an enticingly mysterious title ("you won't believe...") that I'd dismiss as clickbait.
That's true to some extent, but if you look at a lot of clickbait headlines you'll notice that they tend to use gimmicks that invoke reflexes rather than well-crafted phrases that evoke intellectual curiosity. I wouldn't say there's no overlap, but there's less than one might expect.
