I enjoy that you follow your own advice of very clearly having a single detail to take away from the post, reinforced by the title and bolded throughout: you get one story detail. My impression is that you are telling multiple stories of multiple complexities in parallel. That appeals to me, someone who enjoys muddling about in nuanced stories, is what the further details are and how they are prioritized in your post (and thereby recalled by a hypothetical audience).
So what is the second most important detail, the second thing someone would recall when talking about this post to someone over lunch (these are slightly different questions)? I’ll go from memory since it seems aligned with the spirit of the post to rely on the very same flawed processes of interpretation that the post is about. So, with that said, I’d propose people fill in the blanks as the second detail even though it’s not something that you emphasize throughout the post or even, to my memory, put in bold. Why? It’s the most important piece of information to conjoin with AND on the fact that you get one story detail—it makes the consequences of the first detail salient. Other contenders might be audience size determines the number of details (although that seems poorly distilled to me, and might be two details) or audiences can AND details.