Something odd about the logic here.

Why is it I wouldn't be able to take a magic marker away from an 11-year old without getting seriously marked but a bad guy could take a weapon -- a stick, a knife -- away from *me* and use it on me without getting seriously hurt?

Look, a weapon is not a defense, but a weapon with the skill nd determination to use it is. And it's true no weapon or training will guarantee a victory, but they can improve your chances. That's why weapons are around.

clint