If you look at the representation in raid, sorted in order of spec DPS ranking (lowest on the left) then you get this:
There are plenty of spots for BMs. They're a very useful spec to bring to progression. They're especially useful to give special jobs to without it tanking their DPS. Sure it's going to lower it sometimes, but they don't lose as much as other specs. They bring enough that almost all the time if you can have a BM, you should have a BM. When you don't want a BM, you probably consider an MM.
There are more BMs than arms, survival, fire mage, frost DK, unholy DK, and sub rogues combined. That's not really the sign of a shit spec. Also you have the option of going MM if you really want/need to push damage. Warriors, DKs, rogues, monks, mages, DHs, and paladins don't have the option of a DPS spec that's better than the highest damage hunter spec. Overall, there's plenty of options for hunters in Dazar Alor.