Unlike the Soviet 'heroic', which deals with the worker's struggle of survival, Rand's heroic deals with struggle to shape the world in your own imagination. Objectivism is on a higher level of consciousness than Communism.
This is faulty, and your whole inferred argumentation is faulty too. Why humans don't murder each other? It's a contract so we can do better things with our lives. Which doesn't mean you should trust people never to murder you, as simple as that.
I feel like this discussion doesn't belong here. It addresses question of morality and society, neither of which I care about.
What is the Ethics forum good for anyway? Isn't Objectivism beyond Good and Evil?