I think PoE is where this stemmed from. I've seen a few CE post with the gally requirement but idk if I've ever seen a VoG post. There's been raid party's where almost everyone had one and I've been in raid party's where there was only 2-3 people that had one. Idk if it will make people want more gallys per fireteam. PoE they'd only invite people with gallys, and you can only have 3 players max. It might negatively impact the raids, but I highly doubt it. My thing though is why couldn't they have buff'd other heavy exotics to compete. If there were a few more options available I think players would stop trying to find only players with ghorns.