The theme of a lot of literature is the tragic flaw. Characters and people who make a heroic effort are probably going to make mistakes too. Every story needs a protagonist, a hero. The bigger the flaw, the more interesting a character will develop in response to challenges. One of the things we focus on is how to do better decision-making.
Literature is there to learn from other people's mistakes.
That's why the classics become classics - they teach the truth of human experience, the good and the bad. She uses Willy Loman in Death of a Salesman as an example of a complex hero. He's not a simple hero like Superman. He's not much of a success in any part of his life, but he offers us multi-layered lessons of life. Then we looked at people with either too much hero worship or too much disillusionment.