Originally Posted by
Talen
Except their design spaces are very different. You're simply focussing on the few areas of overlap. You're ignoring major differences in theme, concepts, abilities, gameplay, looks and so on to make that statement.
Paladins embody the themes of Justice, Judgement, Vengeance, Retribution. Priests do not. They share a school of magic, a bit of lore tied into the paladin origins and the healing role. And nothing else. They share neither looks, nor theme, nor concepts, nor abilities.
Demon Hunters embody the concepts of Power from Demons, the theme of Demons, the use of Demon Magics and Abilities. All aspects shared by Warlocks...who also share looks and lore, abilities and gameplay. They differ in that one is melee and one is ranged.
You are trying to create a similarity where none exists.