People often say that martial art is one of the best activities out there to develop self-confidence and self-discipline. A lot of parents send their children to the local dojo for the same reason. While it is true that martial art does teach you how to physically depend yourself from bullies, thus making you more confident around others. However, the real growth isn't about the fact that you learned how to fight. The real growth comes as a result of you continuing through the journey without permanently quitting.
Therefore, martial arts training is indeed one of the best journey for personal growth only if you can stick with the training no matter what. You will come out of it on the other end as a better person.