... So why not just, you know, use Flash, hold aggro, and let the DPS melt everything with AOEs?
Firstly, I don't think a tank that can hold aggro is "useless". Secondly, people need to stop measuring a player's worth simply by damage done. Thirdly, what about tanks that try to spread out Rage of Halone combos and still lose aggro anyway? Should they then avoid Flash like the plague? What's the problem with just letting the DPS go ham while you hold aggro? If the DPS could do even more damage, and you have the ability to hold aggro in the face of their increased damage, but you just don't because you want to do damage, then you're deliberately limiting the party's potential, and that is what I call a bad tank.