You're wording is indicative of the problem/reason why the devs won't do it. Call out? That implies negative. Trying to teach or help? That implies positive. Most of the people calling for this stuff subconsciously think this way whether they like it or not. Virtually nobody is going to say "hey, your DPS is actually a bit low, can you show me your rotation" in a dungeon. Then go "okay, why don't you try this". And take the time to stop and teach them in the middle of a dungeon. They're going to say something to the effect of "git gud".
It was intended to be a negative because it was referring to the fact that tanks/healers deal with the negativity all the time when they are performing poorly. DPS seemly get a pass because "WHATEVA I DO WHAT I WANT" and as long as they are having fun, no one else matters apparently. That was the main issue I had with your original post. I'm not saying DPS meters will suddenly make people nice and helpful either, just that it won't dramatically change the toxicity that is already there and (more importantly) it offers feedback so people know how they are performing. I know people on PS4 who ask me for parses either after a fight or even just to watch them on a training dummy, that is not a hoop anyone should have to jump through to improve.
A lot of the bad DPS I see have basic rotational issues, but there is currently no way for them to know that without someone saying something. For some people the situation you are talking about could even be avoided because they will see their numbers compared to others and think "hey, maybe I'm doing something wrong?". It might be naive but I think, in general, most players aren't choosing to be bad. They just have zero feedback and don't know any better.
Exactly, I can count on both hands the number of times I've seen people go out of their way to explain something and not just be a flat out complete jackass. DPS meters are the last thing this game needs. I'm more than happy to deal with bad dps and pick up the slack as a tank then deal with the shit storm caused by DPS meters.
Right, people are already complete jackasses, how will introducing DPS meters make this any worse. Meter use is already incredibly prevalent, and people will (and do) get kicked for bad dps already. At least with an official meter people can see for themselves and know they need to improve, and have the tools to improve themselves.
Should we remove aggro bars because then people can see if a tank isn't holding aggro well? Should we remove ilevels? Should we remove inspecting gear in general so people can't make judgement on what gear you are wearing? Why are parsers the evil line that cannot be crossed. They are a far more useful tool than at least two of those things I mentioned. DPS are so goddamn thin skinned, I don't get it. Healers get blamed whenever someone dies, tanks get blamed whenever they lose aggro, why do DPS get a pass? And why do the ones that don't want a pass get no real feedback on how they are performing when healers/tanks do. It's just a poor system as is.
A parse only for yourself would be an ok compromise, but seriously I see nothing wrong with a full group one.