Never been an issue for me while I've been playing my PLD. So the mob gets pushed back for a few seconds, so what? It'll just come right back to me when the bind's done. So... you could get better with managing enmity on multiple mobs instead of complaining about a few seconds of damage you won't be taking.
Of course if I were a melee and the WHM knocked back the mob I was attacking, well then I'd understand your frustrations.
