Reasoning well, speaking articulately, writing directly and passionately, comprehending first principles, and understanding moral and political exigencies are not skills required only of attorneys or politicians. They are required in all disciplines: theology, philosophy, mathematics, biology, chemistry, criminal justice, English, history, political science, etc. They are also important for being an excellent parishioner, citizen, and parent.
Practically, those who compete in debate usually attend better graduate schools and do better when they get there. Those not bound for graduate school usually find faster promotions in the private sector.