A WAR can pull above 2200 in a short AoE fight, and I will grant you that this is super high for a tank, but for sustained AoE fights like A2S, they balance out and go back to less DPS than a DPS's DPS (that's a lot of DPS).
In Fractal I can do 2800 aoe dps. But if I was Baning a Vulnerability debuff, I could probably hit 4000 or something. You can't count stuff that basically overmultiplies damage in a specific fight.