A great deal of confusion could be cleared up if the title ended with “What you are capable of becoming good at”, rather than “what you are good at.” As well as a recognition that not everyone has the capacity to become good enough to earn a living in any given skill set. Simply working hard with not do it. I don’t care how many baseballs you throw, you won’t develop a major league pitching ability without some basic inborn capabilities. These capabilities still have to be honed the A LOT of work.
People love to use the Micheal Jordan was cut (actually was simply not chosen) from his high school basketball team as some sort of example of hard work triumphing. 1) He didn’t make it as a sophomore. Lots of places don’t have sophomores on their varsity teams. 2) The issue wasn’t skill it was size. He was a phenom as a JV player that year. 3) He grew 4 inches between his sophomore and junior years. If he hadn’t grown any more, would he still have been NBA All-Star?
To move a way from sports, I don’t care how many cadavers you cut up, without a foundation of an unusually high level of eye had coordination in combination with excellent memory and academic skills, you will never become a surgeon.