Scott and Rory,
Thanks for the input.
There is something to be said for being "too" prepared I guess. Your scenario reminds me of the movie, "The Presido" starring Sean Connery. There is a scene there when he is in a bar and someone is picking a fight with him. He turns and tells the guy that he was knock the crap out of him using only his thumb and then proceded to do that. I know it's a movie, but it has some value to it. If we trained only one technique, perhaps we would get so good at that one, then we wouldn't have to worry about anything or anyone.
My instructors do have seemingly great technique, but you know what? I have never attacked or seen them be attacked for real. Who knows how they would react? No disrespect intended to them of course. I have my own ideas of how they would do, even in their prime, but you never really know.
There is much to consider. Personally, I think it has to do with the mental aspect most. Let's be serious, we can teach anyone the techniques, that's not the problem in any art form; however, teaching the whys, whens, wheres, etc., is a whole different problem altogether.