It boils down to complexity: Humans are designed to deal with an impossibly complex world. We have shortcuts that have developed to do so, called emotions, bia

It boils down to complexity: Humans are designed to deal with an impossibly complex world. We have shortcuts that have developed to do so, called emotions, biases, gut feelings, instincts and so on. It is easy enough to manipulate these shortcuts, making a rational person act in a way most people would regard as irrational. This is called marketing, propaganda, gas-lighting or The Nobel Lie, depending on context.