I agree that there will very likely be circumstances and complications that you had not foreseen, or that were not foreseeable.
Just for starters, as pax said...what if he is 75 feet...or 75 yards away?
What if he is firing an AK and you have your trusty LCP?
No matter how badly you want to do what you consider "the right thing", circumstance may intervene.
That's why we "never say
never or
always".