It's so you can know how it feels to start at the lowest level of society and rise to the top. It's about building your character from the ground up to make something of their life, their new found freedom.
It's like I said in a previous thread appropriately titled,
Tabula Rasa?Todd Howard is trying to teach us the essence of Existentialism.
Todd is trying to teach us how to take responsibility for ourselves. It's a philosophy he followed in his younger days which helped him to rise to his position in Bethesda. He took control of his life and lived purposefully. Through hard work and a deliberate march in the direction of his dreams he made it, much quicker than most people.
Now, through these games, Todd is trying to share with us the very core of the ideas which helped him achieve great happiness.
Think about
The Stranger by Albert Camus. Our protagonist is thrown into prison for a crime he committed unintentionally. He floated through life without direction and let the various forces around him shape who he was. This lifestyle culminated to that very point when he murdered someone on a whim, without any planning or realization of what he was doing. After being arrested and spending time in prison he reaches a great epiphany. I won't go into much detail but he finally comes to terms with the absurdity of the universe and accepts his fate. Unfortunately, it's too late and he's executed. No lucky escape with the Emperor or rescue by the last surviving Blade.
Todd is giving us that opportunity. He is saying, 'Here, your new life is yours to create. Don't just be a leaf traveling in whatever direction the wind carries you. Be the wind itself.'
It's a rather simplistic story device to introduce the concept of http://en.wikipedia.org/wiki/Tabula_rasa for an rpg.
Beautifully said.
I hope my post makes some sort of sense.