Why do martial arts classes work1

Why do martial arts classes work? Why do teachers, counselors, and doctors recommend martial art classes for children having difficulty with Focus, Self Control, and Confidence? I have parents that have tried every sport possible and come to me as a last resort. What does martial art bring to your child that these other activities don’t? You could say it’s the rules, but all sports have rules, martial arts is an activity that teaches your child to have good agility, balance, coordination and physical strength, so do most all sports. The list that compares martial arts to another sport is long, but there are a few areas where there is a marked difference . . . .