You simply cannot write science fiction without knowing about science.
o rly? You do realise that in order for a lot of scifi to be possible, we'd have to violate any number of current theories?
Ask any self-respecting non-scifi author why they don't write scifi and that's the answer they'll give.
No, they probably want nothing to do with it because most authors regard scifi as clichéd one-dimension tripe; something that's little more than a flight of juvenile fantasy. I say they're largely right.
Good sci-fi is determined by the story, not the science, as authors like Ursula Le Guin have demonstrated time and time again. If you want real science, read a journal.