Not the op, but I will give it a shot. Free will relates to identity - there needs to be someone exercising the free will. So, what am I? I identify as the whol

Not the op, but I will give it a shot. Free will relates to identity - there needs to be someone exercising the free will. So, what am I? I identify as the whole physical system of my body and especially my brain. The neurons, their connections, the atoms, the laws governing the interactions. I think people rejecting free will are considering physics to be some kind of external harness, constraint on themselves. But in my view, physics permeates my body. There's no myself without the physics (be it deterministic or not), it's an inseparable part of my system, ergo myself. In a deterministic universe, my thoughts and actions are driven by the configuration of matter, energy and physics in my body. But all of that is me.