I tell you what a 390# 6’4” man beats the hell out of me tries to take my gun. I shoot him and he just raises his hands and starts dancing back toward me? I going to pour everything I have into him and pray it’s going to be enough.
And, assuming you are white and the other person is black, the media, the hipster types, the race hustlers, and, sadly, many on FR, would consider you a cold-blooded murderer unless you could prove otherwise. You would be not only guilty until proven innocent, the volume of proof required would be almost impossible to attain, under any but the most ideal circumstances.