Supposing you decide to buy a small coffee, but if some tiny probabilistic quantum interaction in your brain had gone another way, you'd have bought a medium si

Supposing you decide to buy a small coffee, but if some tiny probabilistic quantum interaction in your brain had gone another way, you'd have bought a medium sized coffee instead. Do you seriously believe a scenario like this constitutes free will? In a philosophically interesting sense? I just don't see how randomness gains you the kind of "ghost in the shell" decision making that people usually mean when they're talking about this stuff. It's still just physical interactions, it just happens that these ones are fundamentally unpredictable.