I agree with the sentiment designs, but I don't think that can be applied if the guy is on top of you beating your brains out right there and then. At that point the chance for different outcomes has long since gone and all bets are off - its kill or be killed. I think it's fair to say people would want to avoid a bad situation but unfair to say they shouldn't defend themselves if they are attacked - that isn't the same as fantasizing about shooting someone a la taxi driver.
Hopefully people will not get themselves into that situation but sadly, we know they will. The ones who most need to learn something from a situation are often the least likely to learn it - that is precisely why they end up the ones who most need to learn it in the first place.
It's round and it bites - yes, it's a vicious circle.