I will offer a smiple answer

In general because the super natties kill mortals out right, no one is there to "protect" them at all. Think about it, humans are vampire food. If the vamps could have their way they would pin people up in herds and just feed. They would kill evey single last mortal if they had the chance. Mortals need to be protected aganist all super natties.

Were wolfs are just one big pile of rage and are killing machines. They don't like people because they feel they are of the Worm (i.e. they are killing gaia) The point I'm trying to make is that Mortals are terribly weak and feeble comparted to natties. Mortals own the world of darkness it is only fitting that they should be granted more power in WoD plus I kinda of think that it is a marketing ploy as well. Sure there is a slight draw to playing a Vampire for awhile but can you really get into a charater that drinks blood to live? Or could you play one huge pile of Rage? I find it quite funny really that any of these creatures have "humanity" at all. Why should they? They shouldn't. Me personally I just can't see it. I would love to see a WoD book for playing Angels. That would be a really cool concept.