The best stories are wide as well as deep; wide enough for everyone to “get” the story but deep enough for anyone to find more story if they want it.
Star Wars is an incredible example of this. Millions “get” the heroes journey that pits Luke Skywalker against his father and the Emperor, but George Lucas has allowed the fans to create a rich history that would take years to uncover and understand.
It occurs to me that the universe also works this way. What we experience is amazing when you think about it, but there’s so much more; trillions of stars, sub-atomic particles, even how our mind and brain work.
There’s always more to the story for the true fans.