I would say 70% of the material we have learned has not been used by us on the street. Does that mean it is not worth training? Only you can answer that question.
Mamy people carry guns and never once draw them. I think they are the true warriors.
Actually you are more on target than that sir as usual. 100% of what people physically learn from confrontation is not used by most, so that is not the reason. Statistically, unless people have an occupational mandate for physical confrontations, physical fights are almost non-existent among us civilized mature adults. (Excluding a couple martial arts neanderthals that shall remain nameless

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Do they happen? Yes, but very rarely, and only with a tiny percentage of the population. The simple answer is to prioritze training from the most likely scenarios to the least. And even that is affected by other factors. In your case sir, at your height, forget it. Even for short-statured people it is unlikely, and for you - King Kong and Might Joe Young are no longer with us. We must spend our resources wisely.
I've seen too many people talking about mounts, guards, and applying this principle and that ad nauseum, when just maybe they should spend their time learning how to block that right hand roundhouse to their grill. Most can't block a good punch because their blocks are lousy. They need to work on some decent blocking skills from what I've seen. Instead they prefer to fantasize about exoctic defenses for non-existent threats from super grapplers and stick/knife weiding urban ninjas in the shadows.
None of which I have ever seen in my time on the planet, and I've worked some bad-*** areas with some really scary people. Confrontation, physical and otherwise is what I do.
However everyone is free to do and train whatever floats their boat. I just answered the original question from my experience and knowledge perspective. Now the real question. Do I teach a response for it? Sure I do. I think the mechanics are worth knowing and its fits within my lesson plan for other material. But, if you don't have a clue to the mechanics to defend it, once its applied, than there's no point in working on a defense for a technique that is not only NOT likely to happen, but if it did, they wouldn't know how to counter it.
People often have diverse reasons for their training and that accounts for many perspectives. I always speak from Mr. Parker's perspective. Pure self-defense. I don't have time to get ready for some ninja beast, who most likely wouldn't last a minute in my neighborhood anyway. Some skinny 16 year old, in baggy pants and his hat on backwards would cap him, and move on to the next idiot.
Calling Dr. Dave. Get your hips in town so I can show you the counter for this one. Like the counter takedown material we worked on, once you get it - it's amazingly easy.
Thanks everyone.