This statement highlights the flaws in your analysis.
Self-defense has absolutely nothing to do with punishment.
No homeowner has any right mete out punishment as if he were judge, jury and executioner.
If the homeowner sees himself as doling out punishment, he has already crossed the threshold from legitimate self-defense into assault/murder.
A homeowner has a right to defend himself - and to use deadly force if necessary.
He has no right, or privilege, or authority to take revenge or mete out punishment.
That's lawlessness.
Yes. They do. This is the flaw in your ideology. You require State agents to do your work for you.
How... liberal... of you.