Because before everything got nerfed, Bungie designed a bunch of unique weapon types that are all different in their own way. We still have those archetypes because if Bungie removed them, a probability would be even more people getting pissed off at Bungie. Plus all of the weapon archetypes Bungie created are meant to fit a players play-style. Your play-style doesn't go with any of the archetypes that are low rate of fire. The people in this topic are saying they want low rate of fire autos buffed because it compliments there play-style. If there's a weapon type you don't like, don't use it. For example: I'm not a hand cannon guy, I personally don't use hand cannons accept for a select few.