You've obviously never been involved in a shooting, nor have you ever had firearms training, particularly not IPSC or other reactive shooting against the clock (the closest thing to the real deal).
One shoots to stop, not to kill or to wound. Center of mass, always.
When the panic's on, a misguided attempt to "wing" somebody will likely result in your death or serious injury. When you miss (as is highly likely) the perp will do his level best to kill you and may well succeed.
My weapon isn’t coming out unless I’m shooting. Once that happens, it will be:
One to the chest
One to the head
One to the chest.
Thinking comes after. Thank God I live in Florida.