If Paladin is "specialized in defense" shouldn't its defense be better always?

[Anger]

According to Live Letter XXIII, when asked about Paladin and Dark Knight DPS the response was:

As an off tank, dark knights can also utilize the benefits from this debuff’s effect and that will also allow them to output similar amounts of damage. Paladins are specialized in defense so their damage output is a little bit lower.

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If Paladin has lower damage than the two tanks in an extremely high-DPS check environment shouldn't it -always- be the strongest defender? Whether it be Magic or Physical? I mean, if it's the king of defense and all I believe it should fulfill that role better and not be edged out under any circumstances in that department.

Here's an A1S video with the Paladin at 442 and the Warrior at 633. Both tanks mitigate the same damage one deals 35% more damage doing it.

https://www.youtube.com/watch?v=-6DwKeAkKX0

between V1 = 442 and V2 = 633

( | V1 - V2 | / ((V1 + V2)/2) ) * 100

= ( | 442 - 633 | / ((442 + 633)/2) ) * 100
= ( | -191 | / (1075/2) ) * 100
= ( 191 / 537.5 ) * 100
= 0.355349 * 100

= 35.5349% difference