We dis her for her naivety, but more for that of her followers, true believers all. In her book, Rearden Metal is a miracle. In reality its manufacture would likely create waste second only to nuclear for its toxicity. I mean this figuratively. The point is, in her worldview there's no such thing as negative economic externalities. So it's a fantasy, the impossible to attain pure end of the actually messy and complicated spectrum that runs from there to pure collectivism (another impossibility).
It is an allegory. I don't see why you keep looking for a functional model. It conveys an idea.