In order to have great happiness you have to have great pain and unhappiness - otherwise how would you know when you're happy?
You can take all the sincerity in Hollywood, place it in the navel of a fruit fly and still have room enough for three caraway seeds and a producer's heart.
Given that external reality is a fiction, the writer's role is almost superfluous. He does not need to invent the fiction because it is already there.