Specialists in American Football are a different breed. They can do things that most other players cannot like kick a football over a pine tree or throw a spiral pass 45 feet while looking backward and upside down. Or launch a football off a tee 70 yards.
In high school, punters, kickers, and long snappers play other positions such as quarterback, safety, or offensive line. At that level, most athletes who kick or punt it is just something else you do as an athlete. They have learned their craft by themselves or were taught something by the guy who did that particular job the year before or used Dr.