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.