>explain to the police why there's a dead man in your living room

>and a few hundred thousand dollars later in court and legal fees

This is not legal advice. In the future, please consider not talking to the police for any reason. Please also consider buying legal insurance for self-defense incidents.

Aside from that, I don't see what your point is. The power to defend yourself with violence is a legal right that Americans have in practice in most states. In Texas people with licenses to concealed carry end up committing fewer unjustified killings per capita than the police. They seem to be wielding their rights just fine.