I tend to answer questions with questions. It's how I go about making my point by trying to get you to see it from my perspective.
Just giving up and rolling over doesn't guarantee the criminal will let you get out of the situation alive.
http://www.denverpost.com/ci_5527139?source=rss
I keep Murphys' Law at the forefront in most if not all situations I end up in. And I don't go hunting for problems, but I'm constantly prepared to confront them.
I also take it from your posts that you've never actually been in a life-threatening confrontation. While you have noble ideals of preserving justice without the taking of life, that line of thought just doesn't work in the real world.
And the differences between us are that of only two aspects: The flight or fight instinct (you choose to run, and I choose to resist), and experience. When you're faced with a life-threatening situation, you don't have time to think, but just enough time to act.
Most people who want to run from confrontation are prevented from doing so by the criminal, and aren't willing to resist for fear of making the situation worse. In the end, the criminals will do as they please and ultimately get away with the crime. You however, will have to live with whatever situation that came about as a result of your actions, that is if you're still alive.
I however, will not belly-up and give in. I will resist to the point of using deadly force if I need to. Anyone who has killed a man does suffer the trauma of trying to figure out how they could've gotten out of the situation without killing the opponent, but in the end the simple fact of it is that I consider my life more important than that of the criminal.