Who were the ones who went out to explore the and map most of the planets we roam today? You may have built to walls, but it wasn't just Titans my good sir who fought those invasions off. Warlocks read and try and understand the Light and the Dark, Hunters explore and look for creative ways to use the Light, and Titans are are our "military", bred for battle. Don't hate on other classes brother, you never know when you'll need one of us.