The development of young players. It depends on coaching. While talent is obviously extremely important. There is only so far good coaching can take you. Everyone, at some point, will reach their athletic and technical limits.
But despite these upper and lower limits, there is still a great variance depending on the input that young players receive. Even senior players attest to the impact that good coaching has had on their games, teaching them new elements and expanding their skills. So imagine what a good coach can do for a developing teenager?
Having positive coaches helps develop good players.