I was reading those 'what good is math?' and 'what good is music' comments. You can determine what if any 'system' is good or bad based on the understanding or misunderstanding of the variables involved.
i.e: one does not have any use for math if they do not understand any of the vast variables associated with the concepts of math. Math cannot be any good to this person who doesn't understand.
This principle applies to any 'system' whether it be math, music, love, life... etc.
Do you ever come to Canada?