They are not silly at all in my view,they are part of the history/lore of the game. The game is a fantasy RPG.
Just my view ...but thats like saying,daedroths,spriggins etc are silly....it's creativity.
I dont play as the beast race ( not because i dont like them ),but because i like to make my character look like me,so i choose human races.
But what about people who like to play the beast races?...would it not be unfair to them?
Even though i choose human races, at least the choice is there if i change my mind...its great to have choices,especially on races etc.
Maybe they could add a new race/races,but don't take away those that where there to start with.
I just find your suggestion rather silly actually...not the two races your talking about.
Just my view.