Your example breaks down the moment you put it back in context. SocialSecurityNumber works because it's going to be used across multiple subcontexts. The same reason Vector2 works over using (x, y) tuples everywhere.

I'm specifically mentioning one specific place. This now requires you to go to a different file to see what's up, for every time you need HighlySpecificModelWithOnlyStringAndInt, and most naming doesn't help provide context. All that's happening here is moving vertical navigation to navigating different files. It's a remnant of a time people wanted more specification than object[], but valuetuples didn't exist yet (C#).

And even then, SSN is a pretty well known abbreviation. So your example is also far too favorable compared to most extreme yet real examples.