To be fair, the if you look at the scientific evidence at face value, free will and the sense of self are probably both illusions that work because our brain is not a magic computer but a survival machine. It’s made to process input and help use information to aid survival. It simplifies, cuts corners, and creates an illusion of a narrative self.
(the sense of self)
“you” are just a narrative heuristic for your brain. An effective simplification/method to make decisions based on finite data and finite computational power in a world with near infinite complexity.