The point is: Bungie does not know how to write a gripping story about Vex, Hive, Cabal and Fallen, so they resort to bringing us a Mary Sue that is gay. They try to be "progressive" as to hide their incompetence and that they are out of ideas. Same with Caydes death. It's just the HBO / Game of Thrones method. "Got stuck with the story? No ideas how to progress? Kill a main character everybody likes! So much drama!"