I think part of the problem here is that most of the time, most of the people who are really good at this tend to have an intuitive approach, which makes it har

I think part of the problem here is that most of the time, most of the people who are really good at this tend to have an intuitive approach, which makes it harder to formulate and teach, especially in a way that a less intuition-oriented person can understand and learn from. (Or at least that's my impression as a person in the latter category who has spent years trying to learn more about these things.)