I don't think you saw the point. Sometimes the coaches know what they are talking about. They know when a extra work on a position might help the athlete be successful.

As an example this also occurs in other areas: I probably average having a student in my classroom to work on reading or math 2 times a week after school. Its usually not their choice, I call their parents and tell them its something they need to do.

If one of our coaches told my son he needed to stay and work on something I would be glad they took an interest in him.

I also don't think wrestlers get burnt out, they get beat out. That sometimes occurs when the change from athleticism to hard work and discipline starts to win matches. That usually seems to happen around high school age if the wrestler is staying in state or if the wrestler is trying the national tournaments it starts earlier. Don't confuse burnt out with beat out.