I think that any girl who grew up when Star Trek was in its heyday "likes" science fiction. But it's like sports - we're not necessarily interested in every single stat on every single player of a team we like, so we don't really care about the mass/velocity/time computations that some authors love to include to add veracity, or the loving recreations of the firepower of each and every type of weaponry carried. We're reading the books from the estrogen POV, not the testosterone one.
We tend to take a holistic approach to the story, and look for the links, similarities and differences. We're curious as to the emotions of the characters and to what formed them into the beings they are. We can enjoy a fight as much as the next person, whether it's a space battle or one-on-one combat, but most of us never waged mock battles with squadrons of green army men when we were kids so we tend to look at the participants as individuals and not as mere cogs in the wheel. So endless battles, while entertaining to military historians, can quickly pall.