There is absolutely a space for this game to be like the Horizon series but with co-op. This is a beautiful world and I think PVE should be more incentivized. As other have pointed at- In political theory (minority rule) and in war tactics (blitzkrieg) there is clear power and advantage in coming into fights with the intention to loot players. This isn't skillful or rewarding, the likelihood of success is incredibly high. Abusers of this mechanic should be punished.
