Why people dont bring enha shamans

Hi guys, i have a question. I know that enha and ele shamans aren't the best dps classes but i don't understand why people dont bring even bring them to raids. Most people will prefer 3 warriors but not 1 enha + 2 warriors. I understand that warrior does the best dmg in the game with mage on higher armor pen rates and are easier to play than enha but becuase of the warmane community i think enha and ele shamans are really underrated. I understand that for the raid to perform better warriors are bigger prio than enha but still atleast 1 per raid i think is fair. Atleast 90% of the time i am in groups there is just 1 shaman (because of bloodlust/heroism) and its resto. Almost never enha or ele. What do you think, is that type of discrimination fair or the WARMANE communtity has put standarts no one wants to break?

There's really no huge need or benefit to bring another shaman beyond a restoration one.