Speaking of the "readiness potential" described in the article where your brain unconciously prepares for a movement, what if I were to ask you to pick a random body part and move it? Let's say you picked your right hand. Why did you pick your right hand and not the left? Or your foot? You cannot say, you think it is literally random but it's of course not. It's caused by a combination of a massive amount of variables we have no control over or may not even be aware of.

I don't think you really have control over your thoughts, emotions or behaviours. We are influenced by our genes and the way we are raised, both of which we have no control of. Then we are influenced by our environment, which we don't always have good control of either. The pandemic quarantine affected me but there was nothing I could do to stop it.

The illusion of free will is a mechanism our brains developed to allow us to function as a species and survive. It may be an illusion but it is a necessary one often times.