Please. You are grasping at straws now. That proves my point. Raids need specialists, not hybrids. So while an elemental shaman could heal a bit, it would be painfully weak, whereas in vanilla PVP they could heal themselves to full fine.
Ret paladins ARE hybrids. They were healers in triple DPS setups. A melee DPS spec replaced actual healers in that setup.
Try again dude. The need to win an argument is really really shallow.