Well put.
In Colorado they have the older standard (before "retreat") which was "shoot 'em INSIDE.
Different places have different standards. It's part of federalism. You don't like federalism go somewhere they don't have it.
If you want to change Colorado law then try to change it.
Regarding the most ancient law, revenge, once you kill somebody's kid it's arrogant and stupid to hang around waiting for it ~ hoping you're a better shot ~ 'cause you're not.