The reason you can't be the next J R R Tolkien isn't because you don't have the talent, but because you're not the right kind of unwell. Tolkien wasn't bent for fantasy worldbuilding; he was bent for constructed languages, and got into fantasy worldbuilding in order to provide a material context in which to ground the notional evolution of the languages he invented. If you want to be the next Tolkien, you can't start with the worldbuilding; you've gotta find something extremely specific to fixate on, and develop it in such depth that inventing a world to contain it is genuinely the most logical next step.
Hope I'm doing something right, then, because my world developed entirely out of reading dense decades-old critical theory for fun. Wonderful feeling to be reading Michel Foucault in the middle of the night and suddenly think, "Ooh this could be a magic system"











