From the article:

PS - Some people may be tempted to tell me that people fear markets simply because markets are destructive, evil, create unhappiness and inequality, etc. That obviously is not the answer

Or like how "people believe in dogs because there are dogs" obviously cannot be the answer to why people believe in dogs.

In short, I think this article is highly suspect. It assumes a lot of non-obvious stuff as "obvious", including the very premise that people don't like markets as much as they should.