You look at any team-based sport, you have cooperation (the team, like, totally duh!) and the competition (enemy team must die!) you can't have one exclusively. In the scope of this game, Arena has two team based cooperative+competitive queues (TDM and CTF) while having one free for all, pure competitive queue. In the game, you have competition all around you in every populated system, minor factions fighting to get to the top. You have community goals which are cooperative, unless there's an opposing goal from a different faction (Empire vs Emperor's Dawn, the Feds searching for debris against that random corporation recently). You can still compete against a 1 sided community goal, but it doesn't count for much.
I haven't had my coffee yet.
In light of recent threads about Powerplay bonuses, I can't help but see this as a knee jerk reaction. An attempt to change the goal posts, to say "here's a poll to say why!"