If Jesus had the sort of superhuman command of the events leading to his death that John wants him to have — then it wasn’t a real death was it?
In death we lose the last pretence of controlling our lives. It is humiliation. Its is a stripping away of the last bits of who we are or try to be in this world.
By painting a Jesus with this much command John has given us a Jesus who is not human and who really could not have tasted death. The death becomes irrelevant in a way.