Why couldn't the world that concerns us- be a fiction? And if somebody asked, 'but to be a fiction there surely belongs an author?'- couldn't one answer simply: 'Why? Doesn't this "belongs" perhaps belong to the fiction, too?'
Science fiction is never about the future, in the same way history is rarely about the past: they're both parable formats for examining or commenting on the present.
Whoever realizes that the six senses aren't real, that the five aggregates are fictions, that no such things can be located anywhere in the body, understands the language of Buddhas.