Science Fiction and Fantasy

Science fiction and fantasy are intriguing, but more so is the reaction toward and admiration of it. Unfortunately I’m not really a big reader (at all), but I’ve been looking for books or stories of the introspective sort - science fiction that is not built upon the fantasy of what is not there but on the convoluted perception of the reality that is already there.

There are so many stories of time travel, alternate universes, stories of the dead, stories of the extraterrestrial, stories of superpowers and things of all sorts that are not believed to exist in ordinary realities. People seem to be so drawn to this - fantasy, they call it - science fiction fantasy because it seems to be to some extent scientifically possible, but nonetheless does not “exist” so to stay under ordinary circumstances, and so it exists only as “fiction”. But why? Why are they so drawn to these fictional descriptions that are built upon their concrete perception of reality and so in turn aren’t really alternate realities at all? Why it is that they become so fascinated by things that are no different than their already concrete perceptions of the universe, so different but superficially - their idea of an “extraterrestrial being”, beings, whatever of similar nature - but what they build hardly ever if at all exceeds their perception of what consists of their possible reality. Why have they not explored the infinite loop of their own “ordinary” reality from there built true psychological thrillers? (Their thrillers seem to be limited to ideas of serial killers of convoluted identity and murders, deaths, of some sort, but only superficially). 

Will someone please introduce me to any book, story, writing, fictional perception of any sort that is not just another superficial manipulation of superficial perception? I am really tired of ideas of “aliens” that are basically no different from humans and “time travel” that bares no allusion to the mystery of reality whatsoever. Where are the right places to search? Are people’s imaginations really this confined?