Because we haven’t yet done the things to which “Yes We Can” actually refers.
“Yes We Can” is not about the election.
“Yes We Can” is about fundamentally changing the world to a place where we can be hopeful and happy and celebratory like we were last night, if not all the time, then a hell of a lot more often than we have been.
It’s going to take a lot of work. Listen to Barack. That’s what he’s telling us. It’s not up to him to change the world. It’s up to us.