Exept it DOES make you armed. How can you have a gun and not be armed? Is he saying that you have to be carrying a gun to be armed? That's correct. But even if your're not carrying a guitar, you're still a musician. The analogy dosn't make sense.
Evil tim seems to word it correctly. Just because you own a gun does not mean you know how to use it or how to hit what your aimin at.