From Against Worldbuilding by Lincoln Michel
At the same time, fans of worldbuilding works focus not on the arc of the story, the struggles of the characters, or the aesthetic power of the fiction. They focus on the inevitable moments when worldbuilding breaks down. My least favorite example of this is the “crazy fan theory.” These normally begin on a site like Reddit, then spread like Kudzu across the internet. Why didn’t the giant eagles simply fly Frodo to Mount Doom? Well, it would be a really boring story if they did! That doesn’t satisfy fans, who instead create fan theories that “explain” and “fix” and “change the way we see” famous works like The Lord of the Rings. (These crazy fan theories exist for basically every popular book or movie that has ever been produced.)
It isn’t a world that a writer is creating, it is a story. The goal of the writer is not to clutter the path with every object they can think of, but to clear the way for the reader’s journey.
The main reason I think worldbuilding has become a problem is that it leads people to believe that “realism” is the primary point of fiction, even fantasy fiction. But representing reality — whether “real” reality or a fictional one — is simply one way of telling a story, just one house in the city of fiction. Surrealists, magical realists, post-modernists, and countless other movements or styles create fantastic worlds that function on other levels — mythic, philosophical, Freudian, etc. — that are at odds with this idea of worldbuilding.