I do not mean to brag but, every single FMA or knife guru I know of would die if they did what they do unarmed against me with a knife. I would have to deal with some bruises and injuries from what they would do to me, but I would only have to tag them a few times to kill them. If we both had knives, the dynamics would change. But if I really wanted to kill them I would not attack them while they had a knife. So what they do is not suited for the strategy I would use when I knew that the only knife in the fight was mine. If they had a knife and got it out, I would run. If they tried their stuff that works against someone used to fighting another person with a knife I would kill them. That is not bragging, it is just the reality of the situation.