Bhassler wrote: the actual teaching of the stuff shouldn't take long at all. A good teacher should be able to teach a moderately advanced yoga, dance, or Pilates student...to generate meaningful internal power reliably in just a couple of lessons, at most. Once you get the basics you can refine it for a lifetime, and individual physical and mental limitations can change the learning trajectory, but the whole idea of needing years to learn it or it taking thousands of repetitions is bullshit.
To a point. That's rather like saying you can teach the basic movements of each piece in the game of chess in just a couple of lessons, at most. Once you get the basics, you can refine it for a lifetime. Anyone can learn the basic movements of the chess pieces, but it takes a whole lot of practice, thought and loosing before a player has any real grasp of the game and has any real facility with it.
Or tennis. Anyone can learn the backhand, the forehand and the serve in just a couple of lessons, at most. It's easy and once you get those you can refine it for a lifetime. But, after those few lessons, one isn't going to win any games or have any "reliable" competency. That takes lots of practice...
Then, of course, there is the issue of what, exactly, does "generate meaningful internal power reliably" mean. After a few lessons, can one expect to manipulate like a rag doll an opponent half-again one's size? It's not a discussion I'm interested in, but it needs to be pointed out, I think.