A good story should make you laugh, and a moment later break your heart.
Your life isn't about doing one perfect 'thing' and then falling down dead. It's more like going to church or writing a book. You do it over and over, always trying to be a little bit better. Then you die.
In books, you can just wallow in dialogue, and you can just wallow in written words. In screenplays, every line has to serve the purpose of the line that's implied before it and the line that's implied after it. Maybe five lines have to do the work of fifty lines.
Maybe it's our sins that give God consolation when he finally has to give us cancer.