I can't say why they oppose, maybe you're right but I don't have evidence of that, so all I know is they seem to be ignoring the facts and blindly grasping the way it's always been done as the real reason. I hope the imms will make the change. It does nothing to hurt anyone or anything, is not abuseable, and would make the game for those trying to join battle marginally less unfun. And that's the real point, it's a game, there shouldn't be a barrier to fun that is totally out of a player's control, and can take weeks of time.