Tell that to this guy.
This video appears to be an assassination attempt against a corrections officer. The perp pulls and fires, hitting the officer in the ankle. The officer pulls his concealed weapon and ends up killing the goblin.
Let's look at the lessons here. First and foremost, it can happen anywhere. This guy was sitting on his front steps.
Second, just because the thug gets the jump on you doesn't mean much. Shooting a gun isn't like the movies. You don't hit much when you just point the weapon in a general direction and pull the trigger. Case in point, the officer was hit in the ankle.
Third, just because you're hit doesn't mean you're dead. Pain tells you at least you're alive to feel it. Don't give up just because you're injured.
And last, you have the right to defend your life using the best tools possible. The criminals aren't deterred by anything except overwhelming force. All the kung-fu and fancy pepper sprays would not have saved this officer's life. What saved his life was that he had the best tool ready, available, and was mentally prepared to use it.
Hat Tip JR at A Keyboard and a .45