My top four: Behavior is hard to fix. People say they’ve learned but they underestimate how much of their previous mistake was caused by emotions that will return when faced with the same circumstances. Being good at something doesn’t promise rewards. It doesn’t even promise a compliment. What’s rewarded in the world is scarcity, so what matters is what you can do that other people are bad at. People learn when they’…
Most fields have only a few laws. When I've had the opportunity to talk with true experts in different fields, I was surprised to find that they tend to focus in very few factors, unlike books or other practitioners. Wasn't Karate Kid training something like that? The master was only interested in a few exercises that were done doing repetitive tasks apparently unrelated to fight.
Movies and stories don’t portray real life experience, as they cannot juggle all the relevant factors of an expertise without confusing the audience.
I don’t know about martial arts. But at least in the few professions I do understand, you cannot just do a few exercises diligently for ten years and come out a master.