We have too much power to allow that. Yes, Joe, you're right with this. But I insist, ST is a bad film. Heinlein honestly believed that the most honorable thing a man could do would be to give his life for his country. But I think the sentiment can lead to horrors.
Patriotism is the last refuge of scoundrels, as they say.
It's also the justification of a lot of inhumanity. The problem is that a person does have to be willing to sacrifice his or her life for the good of his or her cohorts. But you do it reluctantly. For good reason. And without cruelty.