The guys in the Ferrari and the Mazda will beat the guy with no car in a race. The car less guy could call an uber (law enforcement) but it would be too little too late.
Arm and train!
Discussion
You're making the common presumption of a situation where violence is inevitable. Almost all of the time it can be avoided, unless you escalate it.
I agree, violence is extremely rare. I’m a very peaceful person and would never take the first step to escalate violence. But on the rare occasion that violence may arise, I’ll be prepared. I don’t leave home without it.
Capability is already a form of escalation. If there was a potential fight, now there is a potential gun fight, and you'll be in it because you are a threat. I understand where you're coming from, but I don't agree that you'll be prepared.