That's an interesting point. There is nothing wrong with fantasy. It is wonderful, because it can take us places that reality can't. The interesting thing about fantasy is how various writers get their readers to engage in "suspension of disbelief".There are three techniques, which I use.I like both realistic stories and less than realistic. I myself have written both. The unrealistic stories are usually the result of my weird fantasies, like the fat man in Chicago who mysteriously wakes up the next morning in Dallas, where he is put on display as the raffle prize at an all-woman convention of fat admirers. "Unrealistic" stories are fine as long as they are unrealistic in a realistic sort of way (like Ray Bradbury, for example).