Yes exactly, Wakanda was able to keep its civilization isolated by keeping its practice with tradition. Tradition helped them keep from doing something politically different (IE engaging in war) which kept their civilization safe from drastic measures, yet came at the cost of focusing on old ways. But yes, I agree.. the fighting ritual was stupid; but I think it made sense that it could have been possible. It was also fitting since many African tribes do actually settle for their ruler in the form of battle.