Trek:
This is science-fiction, but we want our science to at least sound plausible. Therefore, most of the time, our scientific explanations will be rooted in scientific fact or at the very least solid, generally accepted theory.
Gate:
We're about half and half. We try to make it plausible sometimes, but usually you just have to technobabble your way through it.
Wars:
This man has a laser sword. Why does he have a laser sword? Because laser swords are cool. This is all the explanation you need.
They don’t jump 36 feet into the fucking sky do you know how terrifying that would be the human race wouldn’t have survived because we’d have all had heart attacks while still in Africa