Thought provoking. The point of the movie is not the action. Spoiler Alert...
The point of the movie is to bring home the reality of every developed nation having a nuclear arsenal, what could potentially happen, the chain of events that will happen if a nation deploys one of those nuclear weapons, the stress level for anyone involved, the decisions that might have to be made, and the stark reminder that these are real people's lives and relationships. The point of the movie is not the ending nor the action, but to pause and think.