Because we, no matter how arrogant, cannot predict the future. Putin could have a heart attack. He might be assassinated by an insider. The soldiers may even de

Because we, no matter how arrogant, cannot predict the future. Putin could have a heart attack. He might be assassinated by an insider. The soldiers may even decide the war isn't worth fighting. Putin is not a God, he is a man. The circumstances of that are extremely unpredictable.