Love the "he could have shot him in the leg" crap. No. That doesn't stop anyone. Shoot until the threat is neutralized.
The other guy they quoted is slightly wrong. A 100 pound woman does not have let a 200 pound man beat her to death simply because he is unarmed. She can use a gun to permanently stop the threat. Even a 100 6th degree black belt isn't going to trade punches with a 200 pound man. But if she got lucky and killed him with a well placed kick, some liberal DA would still try to prosecute.
The problems I have with the old "he could have shot him in the leg" philosophy are many layered. Back in the early days of our marriage, this was a view I had to deal with my wife about. (Her comment was "shoot them in the knee".) Fortunately, she got my points...and later, as a parent, those points became closer to her heart.
First of all, you don't pull a gun on someone unless you actually are in reasonable fear for your life. "Fear for your life" means you're in a no-sh*t, his-or-my-life circumstance. You're NOT fooling around here, because your very continued existence is at stake.
The concern for your attacker's health and well-being are forfeit the moment he places your own life in imminent danger.
That's a mindset that many people don't understand because they've never seriously thought about it, are naïve about it having actually thought on the matter, or haven't ever been in a life-or-death encounter.
The knee (or leg) is a small target. VERY small, when talking about a knee. And it's not likely to be a motionless target at whatever optimal target shooting distance you practice at. So it's going to be proportionately difficult to hit...more so in an actual life-or-death encounter when you're scared sh*tless and the adrenaline is pumping.
I told my wife that I wouldn't take a shot to the knee knowing this and I consider myself to be a good shot.
Another factor that many people who like the "shoot 'em in the leg" philosophy is the fact that one of the largest arteries in the body feeds blood to each leg: the femoral artery. Nick or puncture that and the guy you just shot bleeds to death in minutes anyway. So shooting someone in the leg is, by NO MEANS, a "safe and humane" shot to your attacker.
Center of mass in the torso. It's the biggest target, therefore the least likely target to miss under high stress, life-or-death conditions. And, coincidentally, that's where the vast majority of all the internal organs reside.
Don't. F*ck. Around. With. Your. Life.