Yes, and definitely no. Yes, Sci-fi is an appropriate medium for the expression of archetypal human activity and relationships, as well as the exposition of social, political and philosophical trends and issues. Experience shows that sci-fi writing leads the way in predicting social trends, critizing political processes, speculating on the pros and cons of technological innovations, and extrapolating philosophies to their ultimate extension.
Lets come back to it later.
But sci-fi in the movies is a different story. The movies don't support strong dramatic stories. The reasons they favor technology as the lead in sci-fi movies are many. I find it unfortunate that when they spend x number of millions of dollars on actors, sets, special effects, and so on, they don't make an effort to raise the story to a commensurate level by employing the great sci-fi writing talent out there. Very rarely do we see a classic story by a Heinlein or a Clark.