Because, Warlocks try to reach out teach others about the mysteries and powers of the Light and Darkness and Hunters.... just don't care. Based off of what I've seen/know via grimiore, Warlocks try to tell Hunters and Titans about these powers and Titans just fall asleep, while Hunters just care about their looks and look at you in a funny way like you're high. There could be more, but that's just what I think.