Really?
IRL, you know the game you are going to play before you agree to play. You also know your team mates. Some times, the people who leave are not rage quitting. Also, if you kill your opponents, they put you in jail for life. Oh, plus, Star Wars is not the real world.
And as far as Gabe saying leaving is not intended, maybe someone can then explain why there is a UI option to leave the warzone? Bug?