One of the nice things about climbing the "ladder" in baseball is that you tend to come into contact with ever-more-knowledgeable baseball people. If a player shows sufficient aptitude and passion for the game, good advice will often come his way from knowledgeable people who take an interest in his progress in the sport. When it does, listen to it.
I'm reminded of Buster Posey when he was at Florida State. A Freshman All-American at shortstop, the well-publicized story is that Mike Martin, Jr. and another assistant went to Mike Martin, Sr. with the suggestion that he move from shortstop to catcher. What is less publicized but was pretty well known in college circles at the time was that the FSU assistants had listened to several professional scouts who had come to them with the idea. The rest as they say is history.