It could be, if WAR didn't keep all other mitigation tools ready for action, generally with shorter cooldown than PLD and DRK.
Especially when one of the above is designed to be "The mitigation tank". (Three guesses which one it is, the first two don't count)
Second wind can still save you or give the healer the few seconds it could need to bring you back on foot. And it costs nothing. As a DRK, I'd rather have LNC than MRD as a cross-class, to refill my TP or improve my parry rate.
(And deal more damage as an OT with BfB, but shhhhh)