Sometimes I wonder if Sci-fi has done more harm than good. It provides conclusions that people so badly want to prove true that they will look for any evidence, however meager, to bolster their arguments. Maybe there was life on Mars, but the main motivation to believe that right now is that many people have read about it in fantasy books. Much more devastatingly, Sci-fi has driven what technology people develop, and often it has led to technology that has made the world worse.

Meanwhile, those stories about martians are all metaphors. But people can't distinguish the symbol from the symbolized.