Does the future freak you out? Does reading unnerving science fiction stories make you uncomfortable about what may happen to you or your children or your children’s children? What do you fear most: technology as such, or the way the technology is (ab)used by people?
Dystopian science fiction, from the time it first appeared 100 years ago, grew out of our own preexisting anxiety about technologies we couldn’t control. It appeared because we needed to put a face on the vague yet very real unease caused by the rapid evolution of tech and the dwindling number of people with the power to both create and fully utilize its scope.
That, of course, is what good books and stories do: they make you think about what is and what could be and what should be. So I agree with the author of the above quote: we need dystopian SF (and public debate, of course), to keep us on our toes about our society develops.
By the way, you should remember: science fiction is mostly fiction. Science reports, say about global warming, can be just as scary, and should be taken much more seriously than what creative minds write down.