I feel like you're moving farther and farther from the original point you replied to. I also don't feel like either of us is gaining anything from this side discussion, so I'll let it drop.In a different thread, you admonished someone for being "MMA or bah." In the same thread Drop Bear was doing pretty much the exact same thing, he just wasn't as aggressive in his wording.
If you're talking about the practicality of teaching that in the US (carjacking and carbines), then I would agree it's not the greatest investment.
However, dealing with heavily armed individuals who hold you up in the car, is a thing in certain parts of the world.