The problem of course is that even if some fictional stories contain the right moral lessons, the ones that would work out in the real world, you can't tell them from the ones that are 'wrong' and 'false'. At best you can find stories that tell lessons you already agree with.

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.

Even, when you have a totally true and unbiased report of a true story, will it always lead to the right ethics?

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?

Just because something is abhorrent doesn't make it "false".

Bad people get away with terrible things all the time. No amount of moralizing changes this true fact.

I don't know, which kind of ethics you would prefer.

The one that doesn't lie to me?

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.