I'm not trolling, just convinced that tanks are not meant to focus on dealing damage, ever. No one's said that active mitigation is difficult, that's just the basics of what a tank should have to handle.
That it hasn't felt like you've been able to protect your group since TBC is Blizzard's failure, and in raids I agree for the most part. Most boss mechanics are really lack-lustre. I think that's why I've had way more fun in mythic plus dungeons this expansion than in raids. At least there I can make full use of my tool kit.
The biggest reason I react as strongly as I do, is because I've been playing this game since Vanilla, and over the years the focus has been moving more and more towards one thing: Damage is the only thing that matters. It's the only thing DPS care about comparing to each other, warcraftlogs rankings only ranks damage, not how well you handle various mechanics, so someone slacking off not doing what they are supposed to do will rank higher than someone who does their job.
If damage is the only thing that matters, then I'm not even sure why I'm playing this game any more. Damage is the most boring, most basic thing, and at least in my mind, it has always been what you fall back to when you have nothing more important to do.
This challenge, which is intended for tanks, has the main focus of damage. You're not protecting anyone or anything, you're merely chasing down threats and trying to kill everything before you drown. That's a challenge intended for dps, not tanks.
This, is a tank to me: