It's the status quo in Japanese systems, you realise Omote (the "face", or "outside") and Ura (the "shadow", or "inside") aspects While you might not understand it, it is the norm.
It is indeed the norm, and that's the very problem. These concepts should not be applied to fighting techniques, because when you attempt to do so, you make it impossible for yourself and for anyone else who follows that doctrine to train effectively. The training becomes pseudo-training unless you can actually train a particular technique. If you're busy keeping what you consider the real stuff a secret business, you're not actually training and trying out what you yourself think really works. What's more, the real "inside" stuff isn't open to being tried and tested in the open, criticised and discarded if found useless. You're only training what you yourself consider to be an ineffective side-show, i.e. the "outer" movements. The logic of that...
Er okay you do know that "occult" and "occlude" are two different words, yeah? "Occlude" is to obscure, hide, or obstruct "occult" is a reference to mystical or supernatural powers
It's both occluded and it's occult. The Latin root of the adjective occult is occulo; the verb is occulere. Another English adjective (with a different meaning) from this root is ocular. The word occult is not oc + cult (where "cult" = religion). Common usage in modern English has given the word "occult" a connotation of something to do with powers, spirits, religions and mysticism. However that's not the proper meaning of the word. It just means hidden from sight. The modern English use of the word occult is still wider than its popular connotation. For example, the "occultation of Saturn", the "occultation of the Shi'ite Imam", and most English dictionaries say that "to occult" is valid as a transitive verb.
For the record, outside of movies, I've never come across this at all.
It's fair enough you haven't noticed it. But then you are a ninjutsu guy, and the taijutsu component of ninjutsu to my eyes resembles traditional Japanese jiu-jutsu more than karate, and there's no evidence that ninjutsu during the post-WW2 period was affected by a bitterly resentful Japanese warrior type. But let's say it was happening under your nose. How would you know? The only possible way to find out the motivations of historical Japanese martial arts stylists who started modern schools inspired by Kano's grading system and modern military marching drills is to closely examine their lives and psychology. What do we know about Funakoshi's overtures to the Emperor, or about his generation that remembered the glories of the Meiji period and now were being asked to reconcile a new pacifist Japanese (inter)nationalism by Japanifying non-Japanese martial arts to promote the new ideas in the disarmed climate? What was his attitude? It would be a shame if someone trained in karate until their 50s, and discovered their system doesn't give them an advantage over untrained attackers after all, and all they had to show for it were joints that were permanently ruined. If it happened, how would we account for it?
In one sense, the only "secret" is to continue training and focusing on the kihon (fundamentals)
I think we will have to agree to disagree on this one. From my point of view, the conventional advice to practice these fundamentals is the cause of the problem, because the fundamentals can be fundamentally bad. On purpose, and with a view to keeping the social pecking order of the Japanese-headed dojo in place.
I like Japanese people. In fact, they are some of the best people I have ever met. I also like many aspects of their culture. However I may seem critical when it comes to that generation. I think the current generation of Japanese, and the preceding, was a completely different kettle of fish to those who were around in the 1940s and 1950s. It's too easy to lose sight of that.