Why do tanks exist?

[Kohta]

The end game dungeons, like Kugane Castle and The first are pretty fun, until you get a Red Mage. So far this jib, for whatever reason seems to be the highest offender to ripping hate from a tank, and I never had issues in heavensward with this. 90% of the group's I get in have 1 or 2 red mages, sometimes you have to get in the middle of spawned mobs to wait for them to group up close enough for the radius of scorn or even flash (PLD) and by the time that happens one strays off to the (Insert Ranged dps) and especially red mage having some ridiculous aoe I'm fighting the entire fight just to pull hate back that I never got to begin with, when dps are on separate targets you just can't win, the global cool down from flash effects everything else, your shield bash is also shared in that same gcd.

What do you even do, what's the point of tanks anymore if red mage can generate so much threat so fast that you have to focus on one mob to lose the rest to someone else. With my rant over of a beautiful idea of a tank, I lay down my sword and shield and will gladly take a 30 minute queue over an instant headache.

Ps. And let's not forget moving out of range to hit because of radial attacks while they can still hit it. I dread every queue