Somehow i think the OP's post was misinterpreted between what was written as to what was meant. Correct me if i am wrong....
Op clearly stated he/she would not shoot to defend someone else...gave the reason why and asked if they were wrong.
They did not ask if they should or should not shoot given any situation or scenario....it was clearly stated that they would not shoot period to defend anyone other than themselves or their family.
No scenario was covered or suggested that they ever would shoot after stating i would not shoot period. Big difference from never would given a scenario.
Just so that everyone is clear, in my posts I am not trying to trap the op in their words, i am just responding to them as clearly written.
If you ever have to use a firearm, you don't get to pick the scenario!