Quote Originally Posted by MiRai View Post
I'm pretty sure it just comes down to:

A) Damage output is very high
B) Pets can easily be tanks since they generally (always?) take reduced damage (especially on boss mechanics) (may need to be corrected on this one, I don't play Hunters )
From what I understand, they do tank things that a slightly undergeared tank might struggle to survive against. Furthermore pet ress is such a fast cast now that as long as you macro it in to have it cast when one dies, you're unlikely to run in to a situation where all of them would be dead at the same time.

Additionally hunters just generally do more damage, basically all of which can be applied while on the move, indefinitely and are somewhat easier to set up functional rotations for.