Apples and oranges are fruit, and you’ll find them in fruit bowls and packed lunches around the world. They’re sold in supermarkets and greengrocers, but not in fishmongers and betting shops. Some people prefer apples to oranges. They like the appleness of apples more than the orangeness of oranges. Or vice versa. Some people like both equally. But the fact you can find apples and oranges in a fruit bowl doesn’t make an apple an orange or an orange an apple.
Just like science fiction and fantasy.
Everyone knows what apples and oranges are, and they could give any number of reasons why one is not the other. Yet when it comes to science fiction and fantasy, most people can only say, “they’re fruit”. As if that’s all that matters. Of course it isn’t. Otherwise everyone would like the two genres equally – and fantasy wouldn’t outsell sf by five or seven to one.
But because sf and fantasy stories both take place in invented worlds, people lump them together. But not every sf/fantasy story has an invented setting; and not every story which takes place in an invented world is sf or fantasy. So that’s a piss-poor definition. And where do we stop with the invented elements? Robots. Dragons. FTL. Magic. What about an invented organisation? Like… SPECTRE? Are Fleming’s Bond books science fiction? Maybe it’s the degree of invention in the story, then. Like that’s not a movable bar…
The point is, when you start looking at what science fiction and fantasy have in common you soon find yourself tied in knots. However, when you consider why they’re different… then things begin to make sense. Which, logically, implies they must be different things.
So they share a “fruit bowl”, and have done since fruit bowls were invented – but they still exhibit more readily-definable differences than they do similarities. Please stop trying to insist apples are oranges, and vice versa. Accept that they are each their own thing, no matter how many fruit salads you make.