DPS is the job of DPS.

[InfiniDragon]

Thanks for pointing out the same thing I did captain obvious. Anymore in-game lessons you wish to enlighten me with?

Well, not to be rude, but you sort of did say that:

The tank's mitigation allows me to DPS more as healer since I can spend my gcds on rocks instead of cure 2s, which in turn makes up the 1000 dps difference, and no mobs are trying to eat my face.

In any content that isn't over-geared the offense of one is traded by the offense of the other, especially 4-man.

Which is not correct. In any content other than 4 man (multiple mobs), tank DPS will be punished harder than a healer can make up for with their own DPS if the tank sits in stance. What Bourne_Endeavor said is correct.