The Martial Arts are contoversial. Just as Armies can be defeated so too can a person using a Martial Art.
Most martial arts are effective. But that doesn't mean you always win. I have had many fights including multiple opponents and weapons. I'm still alive. Near magical things can be learned in the martial arts but nothing is always 100% effective. I pioneered 'bullet deflection' and have used it successfully. But I admit that a little luck is involved as well. In my youth I studied Shotokan, Judo, Aikido, Uechi-Ryu, Hapkido, and TaeKwonDo. I'm alive today because of that study. In short, Martial Arts are real, not just physical fitness, and should be included in our school systems.
DON'T UNDERESTIMATE SHAOLIN MONKS!
And, don't discout TaeKwonDo!