Why does everyone keep putting the words in my mouth that "it's not what my Master teaches so I disregard it."
That's
not why I disregard anything. I have a very simple standard when I'm looking for the application from a form:
take the motion of the technique, as done in the form, and apply it. Not the motion that kinda sorta looks like the form. Not the technique in the form with a bunch of extra stuff that's never been in any form. Just take the motion of the form, as done in the form, and apply it.
I reject anything that doesn't meet that standard. It has nothing to do with what my Master taught me. It has everything to do with a simple question: why do we do X technique this way?
If the version in the form does not make sense in application, then there isn't an application. If you have to modify the technique to make it work in any application, then there are two possibilities: 1) the form was not intended for direct application, or 2) the technique in the form is bad.
Let's look at another technique that's in forms - front kick. This one is easy to apply. Now, I may need to modify my front kick. I may want to kick higher or lower, I may need to adjust my footwork to be in range. But the basic front kick as done in the forms is an effective technique. It is very easy to see how that technique would work without modification.
Going back to Keumgang, I am going to disagree with you
@dvcochran that the move makes sense as done in the form. (Feel free to offer more evidence than "yes" to the contrary). There are
similar motions that make sense, but then why doesn't the form use the version that makes sense?
The only conclusion I can draw is that the forms are performance-based, not application-based. It's the same as when I do a 540 kick. There's 0 application in being able to jump and spin around a time and a half before executing a spin hook kick. It looks cool. I think it makes my spin hook kick better, because I have to do it in a smaller window of time. I think it helps with my body control, and it encourages me to keep my body in shape so I can continue to do cool things. It's good for my leg and core muscles. But those techniques have 0 application. They are performance-based techniques.