text: Another reason is that you get better outcomes. You can get advice from multiple people, but you will always know when you get the best advice. My dad has gave me multiple advice about one thing, but I never knew what was the best advice, until I heard it. I was sitting on the couch one day and I asked my dad how good do I have to be, to be in the NBA. He told me to practice each day, and to work hard at practice. I didn't know which one was the most important until he later said, and pay close attention to when the coach is talking. I knew that was the most important. Although the other reasons were also important, I knew if I didn't pay attention to the coach, then I could not pay attention in the game, and that is why the guys in the NBA are so focused on the game and nothing else.