What a horseshit thread.
All the videos are guys in a controlled environment. I don't give a shit how tough any one of these assholes think they are, take them out of gear and gyms and throw them in a shitkicker bar in full of rednecks and let'em pick a fight. They not going to clear a spot for take downs. You going to have to deal with the tables, chairs, walls and people.
Are there a few "badass" professional fighters, sure. Are 99% complete jerk offs, absolutely.
As for your Defense Specialist, looks like all I have to do is stay greater than three feet away from him and shoot him in the face. It's one of his bullshit 10 commandments.