How this actually goes down.
"Give me your wallet."
Reaches for gun
Is immediately tackled by second mugger
Face turned into jello
Mugger now has new 5.7
The OP is correct about one thing - escalating petty theft to a deadly conflict is generally a very stupid thing to do in the real world.
I mean I legitimately do understand why you'd be so upset if you really believe nothing has changed in 200 years. Because you'd have to be pretty fucking stupid and that shit hurts.