For the same reason I hate Karl Marx. Both are theoretical and have no grasp of human nature. Econo-Girl is suffering through an Ayn Rand book right now because it's good for her. And of course, one has to read it before dismissing it.
First of all, how can you trust someone who can't spell the simplest name in the English language? Especially if it's her own name.
The book describes a person who is an individual in a totalitarian state. Econo-Girl snorts with disgust because the author has no grasp of the underbelly of human nature, and therefore, human economies.
Is she so naive that there is no room for a contraband economy? Where is the very human dichotomy between what we say and what we do? And the resulting opportunity to make money off of it? And of course, the existence of an underground economy, resting on the reality of human nature, undermines totalitarianism.
Therefore it is Econo-Girl's conclusion that a totalitarian state is not possible in governing human beings. Ants, maybe, but not people.
Don't you feel better now?