I couldn't agree more - wasn't Jesus' death prophesized including Judas' betrayal? One can make a case that they were all puppets - a "staged" drama to get a message across.
But, if I knew I was the son of god (immortal, omnipotent, omniscent) and that I was only temporarily playing the role of a tortured, murdered mortal in a drama written, produced and directed by me, how big a sacrifice is that?
He was fully man and fully God. Hence, He felt all you would feel in a crucifixion - and then some. You wouldn't feel the weight and shame of the sins of the world for all time.