@panzade,
For one thing, a right of center scifi flick would have to talk about Mars, and Cydonia, and about trying to find any descendants of the people who might have gone out into the near stars to escape whatever rendered Mars non-habitable. They would not have had any way to know whether or not anything in this system would remain habitable and at least some of them would have at least tried to get out.
That of course is anathema to leftists and yuppies who earn their livings in what passes for science these days. Allowing for any sort of a solar-system wide catastrophe within the time of anything intelligent living in our system more or less ruins the giant time frames thought to be needed for evolution and evoloserism.