Film writing and concert writing are two very different things. In film writing I am serving the film and it tells you what to write. I have to stay within the parameters of the film. In writing concert music for the stage I can write anything I want and in this day and modern age rules can be broken.
In fiction writing ideas have to be handled extremely carefully. You can't let your characters just be mouthpieces for your ideas. They have to live and breathe on their own.
If I had my way, I would write the word 'insure' over every door of every cottage and upon the blotting pad of every public man, because I am convinced that, for sacrifice that are conceivably small, families can be secured against catastrophes which otherwise would smash them forever.