Examples include Isaac Asimov’s robots, Robert Heinlein’s rocket ships, and William Gibson’s cyberspace.” He called these examples hieroglyphs: clear, inspiring symbols of what a better future might hold. William Gibson writing about a better future? That's not what I saw in his books, but great science fiction doesn't have to portray a better future. In my opinion, great science fiction doesn't have to follow dogma,…
To be pedantic, it _did_ win a Golden Globe for Best Comedy or Musical, but your point stands that it should absolutely qualify as sci-fi.