Well bam, no offense but if you're talking about throwing off someone's emotional balance, you should understand how the psyche works. A person can run the gamut from a permeable emotional state (letting emotions/feeling in) to a fully rigid state. This rigid state is what allows special forces, army, SWAT teams etc. to separate their emotions from the situation.
When in a fight, you are in that rigid state. Nothing you say to me is going to throw me off balance emotionally. Who are you trying to kid here--have you ever been in a real fight? Someone with the intent to assault, stab, club or whatever would doubtfully give you time to speak, let ALONE listen to a damn thing you have to say.
Let's take some other things into consideration. Military personnel, special forces, etc. NEED to be able to use hand-to-hand combat techniques in order to SURVIVE. They encounter this stuff as part of their CAREER. So don't you think they've delved into every martial art, every modality, researched everything so that they can have the best possible survival rate? Now I ask, how many of these guys are taught techniques based on CHI? Don't you think they would be taught WHAT WORKS?! Now who would you trust to be more knowledgeable in the field of combat:
1. Someone who actually encounters situations where optimal training is a necessity for survival, on a day to day basis.
2. A spiritual chi master who plays with hot air baloons that goes to a weekend warrior McDojo class in a strip mall.
I rest my case. You either get it or you don't. I hope you never have to defend a loved one in a REAL situation, because reality seems to be the farthest thing from your mind.