When people develop a product they usually copy what has been done already, without fully understanding why it worked in the first place. It is the understanding of how something works at a core level, that enables a developer or entertainer to create something fun without having to copy what has already been done before.
You can create all kinds of really cool stuff if you know what makes something fun across all disciplines and mediums. The reason why a lot of developers or entertainers, are afraid to make new IP, new games, new movies, are because they don’t know if it’s going to be fun or not. It’s easier to make a sequel, or cast people in archetypal roles because you know it worked before. The irony is that sequels aren’t as fun as the original because the user already made all the discovery of the characters and the world they’re in, in that first movie/game/experience. If you understood what made something fun from a very base level, from a level that had nothing to do with your medium at all, from a universal level, you could make ANYTHING fun. You can make ANY idea fun, no matter how improbable it sounds.
That is why I think its important to understand what fun is, because it’ll let you take more risks, it’ll let you create more original products, games, shows etc.. You don't have to use the same tired, hackneyed formula because it was used before. If you knew how to make something fun from a base level, you wouldn’t have to rely on old mechanics and you would take more risks and reach newer experiences without worrying about not being engaging, and most importantly, not creating a fun product.