It takes a specific kind of brain to appreciate the fantastic, the absurd, the absolutely impossible. It takes a specific kind of upbringing, a certain amount of exposure to abstract ideas, a comfort with picturing things in your head and an appreciation of what could possibly make sense.
To a certain kind of person the idea of a spaceship is ridiculous, NASA is waste of money and significant space travel will never happen. They cannot conceive it therefore a story set in a universe that there is no reason to believe exists, is pointless, incomprehensible nonsense. They see stories on the most literal, obvious level, they have no appreciation for the craftsmanship, the depth of detail that goes into conjuring up pictures of whole worlds that have never been.
Scatting:"Singing in which the singer substitutes improvised nonsense syllables for the words of a song, and tries to sound and phrase like a musical instrument."
Some people like it, others think that since it is gibberish and since the made-up syllables have no meaning, they also have no value.
People who cannot appreciate ideas cloaked in the unfamiliar, the different, the novel, are not meant to accomplish anything with their lives. They are here to work on the plantation never dreaming of escape, never thinking of anything greater than picking cotton, than doing as they are told.
On the other end...
There are people so enamored of the speculative that they become useless in the real world. For them science fiction is a means of escape and nothing more, not literature, not a medium for conveying ideas about the real world, just some place to immerse themselves, where they can forget about their painful, pathetic existences. It becomes a narcotic for the cowardly, a hobby for people with pointless lives.
People too absorbed with fiction generally, and science fiction especially, tend to be useless when it comes to relationships. They are unable to face hard truths and spend their lives trying to escape things. They are prone to becoming delusional, and to being lonely because relationships take a real-life investment to form and keep alive. They think in the limited terms of fictional characters having no frames of reference to do otherwise.