There are definitely times when you can go too far with realism.
Sometimes fun is better.
"Because." can be a perfectly good reason, especially in fiction.
Agreed. After all, the majority of Star Wars, particularly the films, already runs on "Rule of Cool," so why should the RPG be any different?
If it'd make for a cool scene to have a starfighter hovering in place in atmosphere just before laying down a barrage of laser fire at a bad guy base or vehicle, then do it, psuedo-science explanations be damned.