Imagine this, Blizzard offered to sell races like EQ2 does. Would people be happy with that? No the haters would cry. Wait, imagine if they gave them away for FREE? People would cry. Blizzard seems to cause a lot of tears.
In fact this is a good business decision. Once you hit 60, you will need to buy the expansions to progress further.
So all they are doing is allowing new / returning botters to choose the race they want without buying the expansion first.