Dystopian Stories as Propaganda?

Are dystopian tales to some extent pushing us towards a view of the world as systems overruling man's original goodness (humanism)? So often dystopian stories bother me at a fundamental level- the level of assumptions of how the world works. It has seemed to me that they are pushing one towards an evolutionary view of social progress, as if we are doomed if we don't adopt certain apparently moral views of society-structure.

I can understand the explanation that dystopian stories are to make us face the ultimate depravity of existence, but the biggest element in much of dystopian story seems to be that there isn't really right and wrong- the eradication of moral outrage. It's as if (at least some) dystopian stories refuse you the right as a reader to react emotionally to what is happening. Really, it's all just so. Nihilism. That is the ultimate depression of our hearts- at least when there is outrageous evil, you have a sense that there is also the opposite. But denying the possibility of evil is also denying the possibility of good- numbing our senses to evil is numbing our senses to good.

But there is a lot more to this, and I am guessing my question may seem to come out of thin air, rather than having a factual basis in what dystopian stories are really like. Regardless, many of them have a sense of really losing oneself into industry and the machinery of society and existence- they seem to divest reality of any colour, feeling, meaning. I believe ultimately they divest reality of truth. There are many reasons why someone might write a story like this; it could be propaganda for many purposes, potentially, but that is the question: is the dystopian story fad a result of humanism and the subsequent philosophical ideas that sprang from it, or is it merely a progression of the human mind, exploring ultimate depravity (you might say)- the loss of meaning in existence?

I tend to think the fad is definitely the result of recent philosophies, philosophies that are fundamentally false. Of course, we should still ask the questions they by their very substance pose to us.