I disagree with your disagreement. Knowledge may not get you killed, but overloading your mind with the what ifs could. My point of view is this, know the law, decide what you personally can and can't live with and then decide if you need to put a gun on everyday.
There is no clear cut case. Everything is open to interpretation by lawyers, judges, and juries. I made a decision to not live my life in fear, that's why I carry a gun, train in martial arts, ride a motorcycle, etc. Whatever happens, happens. I don't want to be sued or go to jail, but when someone is pointing a screwdriver at my throat screaming they'll kill me, I don't want to hesitate either.