And that's good. Some folks still benefit from external structure. I think that structure is one of the reasons some folks prefer the formality and etiquette of traditional arts. Adhering to rules - by choice - is one way to develop self-discipline. Remember that it's not like the military. This student could have left at any time if they chose - choosing to stay and follow those stricter rules is an exercise of discipline.One of the 5 tenets of Taekwondo is Self Discipline. Not discipline imposed from without.