Morning Scepticism: Causation

In a materialist world, it's material that does all the thinking. Thus its material that makes the decision. Thus any sense of free will or responsibility is an illusion. But an illusion to what, exactly? The question highlights the absurdity of the thinking. How can it be an illusion if there's no you to be fooled? It seems to be that you either own the fact that you are material, or abandon the idea of the self.