When you are armed, the rules change. No more trash-talking, saving face, etc. You hold a higher level of responsibility, and with that, greater responsibility to keep your temper, bite it off, and walk away. Looking like a fool if necessary. They will never know that the reason you are walking away is because you can instantly escalate to deadly force and they aren't worth it. This is the discipline.
As you get older this distinction gets clearer, the things that aren't really worth arguing over after all.