You seem to redefine free will here. Even a ‘weighted calculation’ wouldn’t amount to free will. That’s just another bias our brains would use when making calculations. Free will would require that against all odds, you still possess the ability of choosing your future out of multiple possible futures. That the responsibility of the situation you’re in lies mostly on yourself. That at any point in your life, you could have made a decision differently via unbound will. If you replayed a choice in your life like chocolate vs white milk at lunch, say you chose chocolate, determinism would say that you could replay infinite times and you would choose chocolate every time. With your suggestion of the weighted calculations based one random quantum probability, if replayed, and the quantum probability was like 70% odds chocolate, 25% odds white, 3% odds strawberry, and 2% you don’t take a milk, then when replayed an infinite amount of times over, your behavior would match that spread. Where is the free will in that? It happened according to a mathematical function that existed well before and after your existence. Just laws of a universe much bigger than the individual self.