Quote Originally Posted by DGladius View Post
Providing more contribution to your party is better.
It is that contribution that is hard to quantify. Raising your survivability so your healers can do extra DPS, or has that GCD to make that DPS feel safer instead of going a more cautious route to preserve themselves, that is also contribution, and it's contribution that won't show on the tank's dps parse, but on the overall dps parse.

While tank dps is definitely contribution to the party, requiring less heals and making the healers more confident doing dps is also contribution.

But if one argues against VIT saying "it isn't needed unless you are dying", then that extra dps in the same way isn't needed unless you're hitting enrage. Bottom line, in the grand scheme of things, when you take the whole party into consideration, focusing on tank dps isn't necessarily always the best way to contribute.