I think it's about double edged nature of being in control of your life. It starts off complaining about the terrible job the driver is doing, and that it is now their turn to drive (take control) , then repeats the same thought adding the negative word 'but'. "Yes! I'm in charge of my future!" "Oh shit! I'm in charge of my future!" Nobody to blame, you're on your own, and the future is uncertain.
