The notion that human beings walk, talk, think, and do things because our brains control us is an argument that has been around for decades. It replaced the religious argument that the soul is what drives us or some divine spark ignited by a divine creator.
Now the average person accepts that the brain is a machine analogous to a computer, and when we believe that we have free will, we are mistaken. This view suggests we are like brain puppets driven by the mechanical operation of neurons. Robbed of free will, we only have to go a step further to see that even being conscious is an illusion. As long as the machine-brain is in charge, anything else we tell ourselves is just a story.
Yet the flaws in this argument have been pointed out many times.