I can't tell if this is a troll post or not but, Controller and Dominators have mostly non-sleep holds. They can lock down bosses and sometimes even AVs. They can hold a whole group at bay if too many got pulled or if the tank is being overwhelmed. Can turn some to fight for you or make them cower in fear. Looking at one or two or even three sets on a controller is far from seeing the whole picture. And as for immobs, if the tank were to die or a dps/healer gets aggro, you can lock them down so they can't reach the squishies. They bring a lot more to the table than you're giving them credit for.
