death, the game

If you had the chance to save somebody's life - but by doing so kill someone else, would you do it?
It would depend who the people are, wouldn't it?
Okay, let's say this instead: if you had the chance to save TWO people's lives, but by doing so kill ONE person, would you do it? That's where it begins to get tricky. Are two lives worth more than one? Yes! Of course they are.... aren't they? Are two 'good' lives worth more than one 'bad' life? Are two 'good' lives worth more than one 'good' life? Are two innocent lives worth more than one guilty life? Are two guilty lives worth more than one innocent life?
There is no answer, and if you think there is, get out of my metaphorical sight.
The minute we humans begin to answer that question, we begin to play god. A position, that I believe, no human should be in.
Surely no human can be put in the position of choosing who gets to live and who must die? If we were meant to have that power, why the hell are there 7 billion of us? If we wanted that power, why the hell are there 7 billion of us? It's simple. So why is it that people are playing this role... but not with two or three lives, but with MILLIONS of lives? That's just something I can't get my head around.