What is such a person supposed to utilize as self-defense means against potential attackers? Not a firearm?
Many Americans, totally against their free will, develop disabilities that allow only the firearms-approach of SD. A person in a wheelchair carrying a gun is my hero.
I'm all for people taking their time to practice all the martial arts in the world, but let's be real here, shall we?
I pretty well have defined the SD situations I can deal with. If my luck runs out, I'm done - as were the people in Twin Towers and Pearl Harbor.