Ok, those are good points. And honestly if I just wanted to sit and whine I suppose I could complain all day about how the Koreans let their stuff deteriorate in deference to the Yangban tradition. OK, fair enough. Buts lets take a look at some and maybe through a little different pair of eyes.
First off, lets remember that resources such as the MU YEI TOBO TONG JI, the CEREMONY OF THE ROBE and more modern manuals regarding Korean traditions are still around to be studied. The MYTBTJ takes us a ways back before 1940; actually all the way to 1795. And early part of it take us back a century or so before that! Sure we have lost a lot of materials but there are still materials around. Can't figure what the weaponry looked like? There is the National museum in Seoul. Can't remember what a technique was? Its not like the Chinese versions were all that different, folks.
Secondly supportive or ancillary materials to fill in the blanks are still around. If you don't understand the KWON BUP chapter in the MYTBTJ General Qis' manual with the Boxing Canon that MYTBTJ chapter was based on is still around. And there are still folks practicing Chen TCC which relates closely to the material in both resources. And if you don't want to go back a few centuries for your history there are still military manuals albeit few and far between which detail the martial traditions at the turn of the 19th century. And its not like reconstructing traditions out of books is anything new. Many of the Southern Chinese traditions did this, the Okinawans had the BUBISHI and the Japanese did all sorts of recombinant things right after the Meiji Restoration when it seemed like Western versions of things were errdicating the ancient Japanese culture.
Thirdly, though the Koreans do not have patrilinear succession like the Japanese that doesn't mean that teacher relationships can't be traced. In my own case the sword that I practice can be traced through my teacher, KJN Koo through HIS teachers to the 6 originators of the Korean Kumdo Assn ("Tae Han Gum Sa") and through THEIR teachers to Kong Won Nok who trained in both Korean and Japanese sword and opened an unaffiliated school (Choson Mu-do Kwan) about 1921. Now, I didn't wait for BLACK BELT magazine to decide to figure it was profitable to run an article to find this information out. I went back and started bugging my teachers looking for leads and then started doing research. Thats what needs to be done!! My labor onlty took me back to before 1921, but thats 80 years better than if I sat on my keester and waited for some BS out of one of the Pacific Rim glossies, yes?
Fourth and last, there are still traditions and records and arts that continue today whose records will take you back to where you want to go--- but you have to want to go there. For instance, the KUK SOOL WON people suggest that In Hyuk Suh studied some Praying Mantis in Korea. You need to find published material on who is in the lineage who was a Korean mover and shaker for that arts' lineage. Its published on the Internet! Then start checking dates and places and figure how these two items factor together. There are still Ship Pal Gi practitioners in Korean. Whats stopping people from checking these folks out? There are at least three major Chinese Boxing organizations in Korea. How come no one is checking them out for what they can learn?
Now, lest I have agitated people with my diatribe I submitt that this is only something you need TRY . Nothing says that you can't ever go back to "my teacher says...." and fabled stroies of learning MA from irregular meetings with ghosties and ghoulies in mountain vastness. FWIW.
Best Wishes,
Bruce