If it is possible to prevent a bigger war with a smaller war, the doctrine is acceptable. Any solution that saves lives and resources should be adopted. If it is possible to stop a world war with a smaller regional war, of course, anyone in their right mind would agree to this policy.
Whenever there is a conflict between two differing factors; then, most likely a war would result. There is no preventing war because there will be the struggle for power and control. Also countries are not content to stay docile and there is always the quest for larger and newer territories.