You're making a lot of deeply flawed assumptions here.
Imagining bad scenarios doesn't mean it's the only thing one can imagine. Also, I don't think the person specified in what way "we" are screwed; it could have been humanity in general, which would be akin to science fiction as a cautionary tale; it could have been internationally. Also, people often have mixed feelings about technology, and one person expressing a single comment of caution I think hardly defines the failure of all of whatever "western" civilization is.