We have people being a little uncomfortable in their life on Earth with finances and so on, so Science Fantasy or Science Fiction allows people to think that there are possibilities beyond the gravity of our planet.
“I never dreamed that I would hear 10,000 people screaming when I stepped out onto a stage. Well, that's not entirely true. I dreamed about it but in a performing-on-the-stage-at-Staples-Center-or-Madison-Square-Garden context. But never in a I'm-in-a-movie-that-hasn't-even-come-out-yet one.”