Everything that you find worthwhile, you mean. What is worthwhile is subjective, and different people are looking for different things out of their training.
These things are available, whether someone is interested in them or not. However, if your goal is to understand as much of the system as possible, then you need to go after everything, not just what seems worthwhile at the moment. If you are satisfied with a shallow understanding of the surface of the art, that's ok too. Many people never get further than that.