Ok, hold on Carl, first there are a few things to look at.
It's incredibly popular now to just get to your mid 30's and sync in Ronfaure (s) on birds till you can do birds in wajoam/bhaflau. This means that off the top, we are getting a +25% damage bonus against birds so youre going to do 25% MORE damage per hit that anyone else that ISNT using piercing damage.
Also, you have to remember, birds like to hit hard and fast, enmity lost is a a function of the damage taken and your total hitpoints, so the harder a mob hits you, the more hate you lose, whereas, a Rng is generally standing back and not getting clobbered thus not losing enmity at the same rate.
Provoke is a flat 1800 Volatile enmity with +/- % based on the +/- enmity of the person voking. VE wears at 60/sec. So youre going to build hate faster, and lose hate slower than the people voking, or trying to tank the mob youre fighting on a general basis, unless you have a really good and well gear paladin.
I gurantee that at your levels, if you were to fight mobs other than birds, your damage is going to fall much much closer to that of other DD's.
Now, if you want to slightly gimp yourself when pulling, just so youre not tanking from the, you could always macro in some wooden arrows for your pull shot, they're still going to hurt the mob, but not so much that a tank cant voke it right off you.
Keep in mind as well, at various levels, merit levels start kicking in and you never know if maybe the war thats trying to tank has -enmity merits because he is a blm or whm main.
The correct answer is "not everyone is equal in all situations, but there are some **** players too"