"What do you mean why? There are a lot of people out there who dislike guns, and even bows. So this is the compromise. Rather than a strict melee weapon, give it some range so those naysayers of range have something to fight with and not be at a total disadvantage. Also its just pure badass. See?" I summon a dark minion and I shoot the chain at it, then pull it to me and stab it with the dagger-pistol. "Like that."
You guys are a bore. Must I provide all the entertainment here with my ultra hyper realistic holograms?