Most of this has been pointed out, but having multiple 75's, I'll point this out.
From ~20 brd i've been pulling.
Brd can pull and sleep the mob in camp, ready for the party to keep on attacking.
The most efficient use of a DD is if they are constantly attacking, if they have to stop, that's damage that is being wasted and thus EXP lost.
Brds can pull with elegy, on birds this gives you a headstart as they'll wait to take the spell in then mimic it, vs nin mobs (mamools...) we can use virelai (yes charm) which strips all shadows, if they recast, sleep with horde.
Bards have been pulling since before TOAU, it's like saying, what's wrong with a Ninja not willing to tank. It's the way the jobs play with the current game mechanics, like anybody, why get 10k/hr in a party, when with everybody doing their job properly you can get 20k/hr. Less time spent trying to get those merits.
It's all about maximising your job, if a melee has to break off to pull, that costs the pt a DD whilst they pull. I'd be insulted as a healer if you insisted on being a backup healer over pulling in a party which i could quite comfortably cure. I can usually keep buffs up, full haste cycle includig bard, keep debuffs off players, everybody cured to tops without ballad, and that's on whm. Why do i need backup healer for? I didn't sit down for over 30mins one party, with just ballad 2 50% of the time and no ballad 1, I'd make you pick at that point too, heal or pull, i'll do the other.
Jus' Tha Murzade -"Punishment Dealer"
To live is to suffer, so let me bring end to your suffering