Keeping with the metaphor, I'm not sure that quantum entropy requires an additional source of randomness, only the classic concept of entropy. The thermodynamic laws like that are a emergent projection of the quantum realm and don't always have a distinct analog. Additionally, one could argue a breakdown of the metaphor, that randomness isn't a complete analog for free will, and is only useful for talking about free will in aggregate where the different choices tend to cancel and coalesce.
And, again, none of this is a position I actually hold, just where I've ended up trying to understand the cognitive framework of people vastly different from my own who simply have different axioms they start with.
And, again, none of this is a position I actually hold, just where I've ended up trying to understand the cognitive framework of people vastly different from my own who simply have different axioms they start with.