Good science would actually tend to ruin most sci-fi and definitely almost all comics. A staple of sci-fi is faster than light travel. You simply can't have people going around the vastness of space without it. Yet in the real universe it doesn't seem to be allowable. Same with FTL communication.
You're totally wrong. At least you're basing your assumptions about science fiction on the mass media and ignoring the preponderance of print science fiction. There's a whole thriving genre of hard SF that's predicated on good science. And yes, it takes poetic license, but that's not the same thing as bad science. Good science in fiction doesn't mean slavish and absolute adherence to real physics. It means being sufficiently knowledgeable of real physics that your divergences from it are the result of deliberate and considered poetic license rather than ignorance or laziness, and that you're able to justify those divergences in a way that's convincing enough to encourage your audience to suspend their disbelief.
For instance, in hard SF, FTL travel is often justified by reference to things from actual theoretical physics, such as wormholes, higher dimensions (hyperspace), and quantum tunneling. While those things probably don't actually work the way they're described in the story, and probably wouldn't be able to achieve practical FTL travel in real life, they're still a good scientific grounding for a work of fictional speculation. It's not bad science, it's good, informed science applied in a fictionalized manner. It's only bad if it's the result of ignorance or carelessness. Poetic license is fine.
For that matter, there are works of science fiction that don't involve FTL travel or communication at all -- and which may often use the
lack of FTL as a driving element behind the storytelling. Joe Haldeman's
The Forever War is one example, dealing with the sense of displacement experienced by a veteran returning from an interstellar war to an Earth he no longer recognizes. Another example in a different vein is Poul Anderson's
Tau Zero, set aboard a ramjet starship as it slowly accelerates toward the speed of light and deals with the ever-increasing time dilation. There is plenty of SF that has "people going around the vastness of space without" FTL travel. To find it, you just have to turn off your TV and your video player and visit a bookstore or a library.