Gung Bu stepping across the floor to understand the shifiting of weight. Aside from typos, you may find it repetitive, but then again, so is practice. He has a medical practice and to take time away from healing his patients for a poor student is something he deems wasteful. This logic was based upon a bad experience with ONE teacher. ONE teacher is hardly a good sample size for such a conclusion.
Teachers are necessary and good ones are hard to find.
THAT is desire and dedication worthy of consideration.