I went back through the old threads, and it appears there are some legacy reasons why this is done. From what I can piece together, when the site was established, for better or worse, they set up the privacy this way and there were numerous people who joined with the clear understanding that it would continue to work this way. They liked the idea that others could not view their personal information like their spouses and children unless they explicitly allowed it. When the discussion was going on in 2016, and there was rumor that they were considering changing that policy, these same individuals went to Chris W. and again reminded him that they joined with the understanding it would never change, and should they change it, they wanted out and wanted their data out too. It appears it became a bit of a challenge to somehow balance the viewpoint I think we're seeing, which is that it seems logical that if a movie star marries another movie star, or a politician marries a politician, and they're all famous and public, then their relationships should show as well. However, there's the private individual who wants to maintain their privacy to consider as well, and for now, that overrides the challenge we face with maintaining Notables.
If you want to re-open this discussion, I'd suppose we'd need a separate G2G with a propopsal to place on the floor of what we would like to see. For example, do we want to be able to see other non-private/unlisted persons on a yellow privacy profile? What other persons? Just spouse? Children? Brothers/Sisters? Parents? Or all of the above. We'd want to think through the wording and be careful how it is presented. Do we want this on an opt-in basis? Check box for displaying non-private nuclear family members? Or just display them all? Anyway, that's what I would recommend if you want to open this can of worms again.