fiction — the class of literature comprising works of imaginative narration.
Note the key word there: imaginative. Fiction involves the imagination, not only from the writer but also the reader as well. And if there is one thing I have in abundance, it is imagination.
On The Matter of Writing Fiction
Fiction is what is not real but is like being real. The closer to reality, the easier fiction is to being accepted. Conversely, the opposite can also be true. The more outlandish, the more distant from reality, the easier it can be to be accepted, provided that it retains a common connection to the reader. Said connection could be a sense of wonder and adventure or an identification with the characters and setting.
But in a way, fiction is also a way of telling truths that nonfiction is incapable of telling. The tradition of teaching tales and cautionary tales exists seemingly across every culture in the world, and many are strikingly alike.
Myself, I write fiction because I am interested in the characters and want to see what happens with them. (Sometimes they are quite insistent about that themselves.)