Pressure Points, Dim Mak, George Dillman

I recently had a discussion with a friend of mine who was inquiring about pressure point techniques. I do have an opinion and be advised it is only an opinion. I have been certified in pressure point tactics as a Police Officer and have studied them and applied them in controlled settings, yes they work in that setting. However, when you are dealing with pain compliance there is a hitch. Who are you usually dealing with in an altercation? Someone on mind, nerve, numbing intoxicants, such as, drugs, alcohol. Then pain compliance does not work.
I do believe in joint locks (Chin Na) applications as effective, not so much in pain compliance when dealing with persons under the influence, but in controling the person. They use to teach pressure points to Police and other Law Enforcement, Special Military Service persons, Seals, Delta, Rangers, Green Berets. Now they teach more Knee's, Elbows, and Brazilian Jiu-Jitsu. In fact Gracie Jiu-Jitsu is now very much part of all Military Training.
I have seen Police Officer's right out of the Academy try to apply pressure points, using batons, hands, fingers, and knuckles with no success, why? because the fight is living, moving and the persons they are dealing with are under the influence. I have never used pressure points, mace, I have always relied on Chin Na, chokes and the ground game, (if it went there).
George Dillman, The Yellow Bamboo Cult and Dim Mak are all a bunch of garbage. Check them out yourself and decide what you think.