It's your job not only to select the winning horse, but to out-smart your opponents by finding the spots where you have an edge and can make a decent profit. He had to learn his trade somehow. Of course his father was the inspiration behind it all, but he had to learn somewhere to be able to perform as well as he does. If you listen to him speak he will tell you that he learns by talking to other professionals and of course playing the game. We all learn from teachers, regardless of what our professions may be.
Teaching is a profession in itself.
Teaching requires a true commitment that takes as much time to become a proficient at as the subjects being taught. Well of course, he goes to his teaching professional who straightens out his game. The teacher can see where Tiger makes his mistakes and explain how he can correct them. Handicapping professionally is no different. We need to listen to other true professionals and learn from their teachings.