Give me a reason why Gnomes can't be Paladins

Gnomes and Dwarves have known each other for years now, surely some Gnomes have branched into the way of the light by now, but they aren't playable?

not only that, but in the Death knight starting zone, when you duel unworthy initiates, if you pick a Gnome, they actively say "i was a follower of the light"

you can play a Priest already, and a Death Knight, which is pretty much just a fallen Paladin

Gnome Paladins, make it happen Blizz