Quote Originally Posted by LaRoux View Post
It's just a stupid for them as it is for any other system.

And you won't find judo practitioners trying to pull out techniques from their katas. They learn their techniques in practice against partners.
and there you have it.
"Some" Forms can be a textbook. Many systems don't have forms and simply have a long list of techniques, but if that list is lost or forgotten, so is the system. With a form, you can always extract and extrapolate your techniques.
(mind you, not all forms are textbooks (kuen-faht) some are developmental (gung-faht), but in this specific case, we are talking about textbook.