Usually in places where guns are disabled the third option is robber robs you and gets away. As a specific American band would sing "Sad but true".

Very rare for anyone to have any kind of gun here . The thieves had knives

Do you believe that petty-theft is a shootable offense?

There must be a line between a starving child stealing bread and an armed vault heist. Where is the line where it becomes okay to start blasting?

As I said unfortunately the thing that happens is that robbers rob you and don't kill you. So you are not carried by anyone because you are alive.

Of course I see the value in posturing that you are irrational and will kill the robbers regardless of consequences since if they believe you they won't rob you.

Yeah, unfortunately the nash equilibrium is exactly what happens (even in gun happy USA) - people are robbed and that's it.