Those subjects are tricky enough, without trying to write about them in convoluted sentences heavy with opaque metaphors and intricate similes. Then, too, there is the difference between the optimists and the pessimists. Healthy adults saw off a chunk of that world for themselves and do their best to cultivate it. That is the message of Voltaire's Candide, after all. That's okay with me, but such yearnings should not cloud our perceptions.
Science fiction is a fundamentally optimistic literature.
We tend to see the human race not as failed angels but as evolving apes struggling toward godhood. Even in the darkest dystopian science fiction stories, there is hope for the future. It's those academic thumb-suckers who are the juveniles. In science fiction we deal with the real world and try to honestly examine where in the universe we are and where we are capable of going. In good science fiction, that is.