Newbie Warhammer GM here.
I understand why Elves do not become Wizards - why would they, when they have access to a much more amazing magic than what the humans do!
But why not Priests? I can't seem to find the fluff that points this out. They have their own Gods - and while admittedly, they have a different relationship with their Gods, I don't see why they can't still receive spells.