Closure in real life is never accompanied with a soothing and uplifting song being played in the background while you have an internal monologue about your epiphany. 

Let's play a game shall we?

Let's say you are the commander of a country's armed forces. There is a mutiny and the citizens have taken to the streets in protest. You are dispatched to the frontlines to control the peace.

Then the order comes in from the government ordering you to use lethal force on the civilians.

Can you pull that trigger?

What if you know in your heart that the government you represent was corrupt?