This is a hallmark of most Deftones song titles. As far as why it's not done typically, it's for marketing reasons - easier to find and purchase a song when a few key lyrics are also the title. Most times when Deftones have done this, the song was a single (Change, Beware, Hole in the Earth, Bored, etc.). But then there are rule breakers (like Digital Bath, Passenger, Be Quiet and Drive, My Own Summer, etc.)