This is STILL going on?
Look, in the current expert dungeons I'm in CS nearly the whole time. WHICH IS TOTALLY FINE. Why? Because the color of the icon next to your name means nothing in this game. What does mean something? The list of OBJECTIVES for the instance. If my goal is to Defeat Ser Charibert, what exactly does standing there not casting because everyone's topped off accomplish toward that goal? Nothing. It accomplishes nothing. It contributes nothing. And anyone not contributing to their fullest on purpose when they COULD is being carried.
I'd like to make the point that your ROLE only means something for DF. It helps the algorithm select a group of four-to-eight people with varied enough skillsets to make clearing the instance with random people easily possible. If the holy trinity was unbreakably bindingly important, the phrase "the above composition is not imposed on pre-formed groups" wouldn't be a thing. Except, that it is. And statics break 1/1/2 and 2/2/4 all the freaking time.
Now, I main a healer but when I tank and I see healers standing around, I roll my eyes and move on. I don't waste my breath on these people because there's no casual content in the game I could DF into where a healer not DPSing is going to make me fail. I will willing carry them, because it's just not worth being a butt to someone I don't know and will never see again. HOWEVER, I wish the people who REFUSE to DPS on principle could at least OWN their decision. Like, instead of arguing why literally standing there doing nothing to help is okay, you could just be like, "yeah, I don't like to DPS. You can't make me. Deal with it." and then if they get kicked they just shake it off and queue for a different group and hopefully it goes better for them. Because in no other role would it be okay to stand there more than half the time on principle and NOT get called out for it and NOT potentially get kicked. It's the risk you take when you choose this. Just own it and deal with it.
FTR: I am not against them making instances where we're required to heal all the time. I would LOVE that. But they haven't (for casual content) so I'm not just going to waste my groups time. That's the decent thing to do. Honestly, it's really common sense here. I don't know why we're still talking about it twenty-some pages later (and this is hardly the first thread, so come on now)