There is an argument that free will doesn’t exist because there is an unbroken chain of causality we are riding on that dates back to the beginning of time. Meaning that every time you fart, scratch your nose, blink, or make lifechanging decisions there is a pre existing reason. These reasons might be anything from the sensory enviornment you were in the past minute, the hormone levels in your bloodstream at the time, hormones you were exposed to as a baby, or how you were parented growing up. No thought you have is really original and is more like a domino affect of neurons firing off in reaction to what you have experienced. What are your thoughts on this?
Quantum mechanics only says that you can’t predict the spin of certain particles. Those particles are at a vastly different scale of the things we see in everyday life. Yes, a photon might suddenly change direction and I won’t see it because it’s a wave function, right? But only at a really small odd. I bet it has never happened to me or anyone in my continent, if not the entire human race in all time. Let alone neurones in my brains experiencing quantum effects.
Quantum mechanics dismisses no argument of determinism because how low the possibilities are.
Even if macroscopic particles do behave randomly, it is still a random behaviour, not your decision.