I will agree with this. As a PLD, yeah, it's a little frustrating to throw my biggest abilities and have the boss's HP bar not even budge, but at the end of the day, that's not my job. My job is keeping the enemies focused on me. As long as I'm doing enough DPS to do that effectively, my DPS doesn't really matter (and failing a DPS check is a very rare thing for the groups I've been in, as taking less damage lets the healers stay in Cleric Stance more).
I'll also point out, though, that clutch use of Clemency and Divine Veil have allowed me to save the many a group from a wipe. The extra healing aggro I generate also helps keep the bosses and mobs fixed on me, so that's a plus.