I know I'm sometimes guilty of this as well, but looking for scientific plausibility for any aspect of Star Wars invariably results in the realization that if such plausibility were required, almost nothing in the films would work.
With its story and themes, Star Wars feels more like fantasy than science fiction anyway. I now think of it as Space Fantasy (since fantasy doesn't need to be quasi-medieval).
Hit And Run Poster Extraordinaire
--Too Dumb to Quit--