Kotaku - Competition demands dominion. Dominion begets power. And, if you're serious about keeping that power, chances are power weapons come into the picture.
Power weapons are tools that allow us to deal immense damage. Think stuff like sniper rifles, or even vehicles like tanks. These can dictate the entire flow of the match, so it's not surprising that they're so important in multiplayer games. Players must resolve to always be in control of power weapons, even if they're not using them.