Simon Baker writes:

"Scrum's self-organising team gives individual members an empowered status with the freedom to be creative, the authority to decide the right thing to do and how to do it, and the facilities to learn and adapt to attain improvement. In return, each team member must have the courage to participate proactively in the scrum team, and to be openly expressive and creative. If they don't they will not be doing their best and the team will not advance."

If Scrum was a silver bullet (which it is not, mind you), you'd still need someone to hold the gun and pull the trigger. That someone is you.