You say whoever organized the attack couldn't trust Bin Laden, because he could be in bed with the CIA. He is an asset to the CIA because he is an effective scapegoat. If you did not have the attacks, you would not need a scapegoat, so he wouldn't be an asset at all.
Drawing from your logic, Bin Laden only has value IF there is an attack. I'm sure you see where I'm going from there.