I like Mario Galaxy as an analogy. Facebook, Reddit, etc. aree all like big planets. The difference with the fediverse is that we can make all the small planets we want, and each of those planets has its own communities, and it’s easy to hop around to different places.
But I know not everyone plays Mario Galaxy, so maybe it’s like The Little Prince?
I really don’t think it’s complicated, people just don’t have a clear analogy to work with because it’s something new.