Food for thought along with my $0.02.
No, no one is "ready" for a deadly encounter. I am sure that most of the deadly encounters would have been handled much differently if the people were "ready". Cody Lundin, the survival instructor, once said that no one is ready for a survival situation, that is why it is a survival situation. If you are "ready"/prepared, you are camping. He also said something to effect of, I do not want to "survive" I want to LIVE.
When I was in high school (90's) I remember reading a Jim Grover column where he said that in a gun fight, do not hope. You have no right to hope. Hope is dead. I remember thinking that fit well into many of the martial mindsets handed down to us. Armed encounters are not about walking away alive = win, they are about living a principled life so that one doesn't fear death. Take the fear away and you take the freeze away. Training does that, it tries to turn the situation into a move counter-move scenario. The japanese call it Mushin (no mind). Where you do not clutter the mind with planning. The planning stage is over, the battle is now upon you.
There is an old Samurai saying "Always be waiting for your time to die." That translates a little dry in English, it should say: Always be EAGERLY waiting your time to give your life in a worthy pursuit.
Surviving an armed encounter is not about always having a gun and being quick on the draw and quick to fire. Sometimes that wins fights, but much of the time that action is the result of a lot of other failed actions. Sun Tzu says that the supreme victory is to win without fighting. Fights rarely ever MUST happen. When those rare times come up, remember that you have been waiting for this moment, it is the culmination of a principled and disciplined life and no matter what happens you have lived according to your code. Then no one can defeat you, for you have lost nothing.
If you find yourself in one of those situations, act, but do not ever make the mistake of thinking that the only alternative is: fight, with a holstered gun, squared to the target, at 7 yards. Be careful in dangerous situations of thinking violence, that will feed the encounter. Be calm, think calmness and prepare for the possible battle. You will then enforce your Ki on the opponent.
I have said it before, but the warrior ethos is NOT about death and killing, but about life. Martial traditions are not about training someone how to kill, but about healing those that have.