Is Sci-fi not taken seriously? I think that would be a mistake; it is perhaps true that Sci-fi has more than its fair share of cheap, poorly written, trash pulp fiction - mostly read by young adolescent males - but once you've taken the time to sift the wheat from the chaff there is also very good fiction.
Disregarding Sci-fi as a genre would be like disregarding Romance as a genre, which is to say it would be a narrow and stereotypical thing to do.

