Why won't anyone take Karate, Taekwondo or Japanese Ju-Jutsu to the Octagon?

All the thing taught in those martial arts are deemed "illegal" in such competitions. That sure says a lot about the UFC, huh? The whole point of traditional martial arts is to stop an ailant, even if that means maiming or killing . It isn't something to use in a competition. If so, you'd be using less that half of the actual style.