The bubble is to enhance the damage to bosses like warpriest, golgoroth, second sister, ogres at oryx, going into the shade and getting slammed as you enter. Without it the raid gets a lot tougher. Keeping teammates alive and full of orbs is not sucking ass. If you have hours upon hours to do the raid and wiping often then fine but most want to get in and get it done with as few wipes as possible.