There's certainly truth that of the 3 tanks, if you're -going- to have a tank go full vit and pure brick wall, Paladin is the tank that suffers least from it. Provided you dont nerf your threat into the ground, a full vit full fending paladin will be less "bad" than DRK/WAR simply because so much of those jobs' power and utility comes from their higher dps and their dps-into-self-healing conversion. Plus on trash pulls the Paladin relies on Flash a reasonable amount, so the lack of damage stats doesnt affect them as much as it would nerf a Warrior's overpower or DRK's abyssal/salted.

Not condoning it of course, as Strength is still the optimal way to go. But if you're someone who for some reason -really- wants to be a low damage uber health brick wall tank, Paladin is the one that pulls it off best relative to the effectiveness they lose from not going Strength.