Why I Now Distain "Populace Scale" Purist Philosophy Systems

Is Ayn Rand an economist, a psychologist, a historian? The answer is no.Same with Karl Marx, and a variety of other popular philosophers. Who the hell are these people? Dreamers? Wishful thinkers? Fathers and fools? If I can say anything I can say that these "philosophers" are selling poison goods at the most. Why? Because they sell a product of "purity". Humans aren't pure. So you end in two ways following such beliefs under the "banner" of "sameness", or dead, product of the us verses them mentality that such pure systems tend to breed. We see what happened to Communism, and what kind of mess that ends in. Marx assumes all humans think alike, the worker ant theory one might say. More or less the same could be said if any pure system would be applied with law backing it. Someone dies ( actually usually masses do typically). Purism is a great insanity ... it's child is always and forever death.