In V1S, Warriors have a decent chance at keeping up with Paladins in damage. In V2S it becomes a bit trickier. In V3S though it's impossible to match Paladins or Dark Knights, unless they are extremely bad. You're forced to save your Inner Release combo until after Spellblade Holy, because if you happen to get marked, it's over.

And then regardless of whether you decide to hold your Inner Release or not, it'll either be up right before Mindjack, or just before the giant dragon spawns. Neither of these two situations allows the execution of the mess that is the Warrior's optimal damage rotation.

So you're forced to hold onto your combo until after you've picked up the dragon, or the dragon is dead, leading to a massive DPS loss.

And then throughout several parts of the fight, you rarely get 20 seconds where you're able to do your full combo. And when you do, chances are it's probably still on cooldown.

So yeah, take that into account next time you say Warriors do more damage than the other tanks.