There are so many fictional books which have so much to teach.
You can think of Star Wars how you like, but condemning fictional stories as bad only because they are no "true" stories -- is very short-sighted in my eyes. (and in my opinion a totally wrong understanding of the principles of logic).
There are also so many "true" stories, where you can draw the wrong ethics from!! (newest events included!)
And while 'real' stories might still be doctored by the writer to send a particular message and mislead you to a conclusion, at least they're constrained by the facts.
I very much doubt so.
There where to many people living, that brought suffering to others without ever been punished. Many people that slaughtered others, where living a wealthy life till their end. And others, that did good, ended in poverty.
No, "true" life sometimes teaches the wrong ethics. Or should we find our ethics in slaughtering each others?
Bad people get away with terrible things all the time. No amount of moralizing changes this true fact.
Just because it is possible to get away with bad things, doesn't mean you should do them.
A good ethics system should address this.