Even before the game was released Deej outright said something to this vein at one of the big expos: "Destiny has something for everyone, but we have systems in place to try and get players out of their comfort zones and really experience everything this game has to offer. If you're a PvP guy, you're going to dabble in PvE to get loot and vice versa." It was later revealed that Exotic quest-lines were a large part of this. Personally, I'm all for it. Currently the only way to get everything this game has to offer is to play everything this game has to offer and the title's better for it generally speaking.