Everything that isn't a dry documentation of facts is to some degree fantasy. The best works of fiction actually ascribes mythic qualities to common objects and occurences as a way to deliver on theme.
Of course. We are bind with the rules and expectations of the society. The only freedom is in fantasy. And if there hadn't been fantasy there would be no visionaries, no progress, even no philosophy. Focusing on the fantasy in books (since this is ''books & comics'' segment)... as great author said: ''Some questions are too big and can't be face elsewhere then in children/fantasy books.''