I think definitely that the game would benefit from players in DF treating their tanks with more respect and NOT expect perfection or speed runs every time.

If tanks were viewed as group leaders and necessary members (which...they are) and treated respectfully during runs then people wouldn't be so afraid of the responsibility.

It's jerkwads who yell at the tanks and tell them off about not playing the way they want them to (usually demanding pulls of every monster in the dungeon, then getting mad when the tank dies) that have ruined people willing to sign up with random folks.