What people don't seem to understand here is that he's not arguing that free will exists. He's arguing that propagating the idea that free will doesn't exist can be harmful. And in making this claim, he's rendering the question of free will's existence to a mere curiosity and not something of significance. Certainly if free will doesn't exist, the illusion of it does. And this illusion is what allows human beings to conceive of the universe they occupy as well as what allows for the existence of morality.\n\nSo to people saying things like science should not lie to people about free will, your belief in what should or should not be done relies on your own inherent belief in free will. \n\nLong story short, if you're willing to tell people that free will doesn't exist, at least stress the importance of treating it as if it did.