AND..
Guy, I can guarantee there is nothing 'cavalier' about defending yourself or others. You do what you must to protect yourtself from the bad guys. I was taught to shoot to hit. Unfortunatly for an intruder 'Shooting to hit' REQUIRES aiming center mass. IF it ever happens to me, I am not going to try 'leg shots' etc in the heat of the moment when adrenaline is pumping, nerves are on edge and I have nothing to fall back on but trained muscle memory.
Another point worth considering.. When you are training, practise is a very dangerous word now a days, do not automatically draw/shoot.. Draw/evaluate/ shoot-no shoot.
Because if you train draw/shoot that is exactly what you will do and the results are sometimes disasterous.
It's a fun hobby, and sometimes a funny topic.. but reality is it is deadly serious with someones life and someones death hanging in the balance.