That article is a complete crock of bovine excrement full of nothing but attempts to discourage everyone from taking proactive responsibility for the immediate safety of themselves and those around them.
Owning a firearm for self-defense means you accept the responsibility to know how to properly use that deadly force. Same with martial arts. The WTS is framing the article in such a way that one is to assume that anyone who buys a gun or learns martial arts never learns any judgement in how to properly use the force at their disposal.
I carry a pistol every day. I also practice and train with that pistol religiously. Same with the AR-15 I own (and will do so with the select-fire M4 I'm considering). Carrying a firearm is a huge responsibility. One must know by heart the laws regarding not only where it can be legally carried (everywhere for me, I'm active duty military) but also under what circumstances it may be drawn and fired.
Martial arts is a non-lethal self defense and the WTS' ban on them is ludicrous. First and foremost, martial arts is about control. The necessary amount of force to subdue and/or incapacitate an attacker, not kill, so that you can escape the situation. Yes, the techniques can be lethal. Which is why we are taught control first and foremost so that we are able in a real life situation to use only as much force in a strike as necessary.