Now I ask:

Should damage still exist but be trivial amounts in the grand scheme?

What if Tank DPS was rescaled down from potential 75% of True DPS to 5-10% of True DPS. You would still have the effective scaling factor of DPS to improve upon but it would matter far less in determining the success of a DPS check or the overall the success of the fights.

This could also mean that the stacking of VIT is a larger DPS gain for Healers than the paltry amount you get from STR for this proposed scaling.

You still get your feeling of 'reward' from doing damage, but the design would shift to you completely catering to your party members and boil down to you hoping that they can beat down that pinata before you get tired.

Are you fine with being the guy holding up the pinata while everyone else beats the living @*$# out of it for the candies?

(Once again; design only effective in Raid/Dungeon content where players are more or less forced to rely on other people)