Having a random quantum seed to an otherwise opaque internal process is still a far cry from free will and agency.
Consider thermodynamics:
even without quantum weirdness, we can't compute/predict the micro interactions of atoms in a gas. But most average out, and we can make a lot of meaningful predictions on a macro scale.
Back to brains: even if there is some underlying quantum process that might free us from full determinism, on a macro level, it might not matter - you're still gonna value what you value, and make the same "choices".
And if in some cases a "decision" is actually impacted by some quantum effect... is it "agency"? Or just yet another external process affecting us?
Terry Bouricius (Vermont politician) has a draft book on this topic (link below). He used to be a strong advocate for electoral reform, but after seeing Citizen Assemblies in action, now advocates for Sortition.
He has some interesting ideas about how to structure a modern government with sortition - it wouldn't just be replacing the House and Senate with randomly selected representatives, but, instead: having more smaller bodies with more limited scope (ex. a body for defining the rules of bodies), and spinning out a new group for every major law proposal.
My favorite discovery on this topic (mentioned in the book), were letters between the Founding Fathers of the US where they explicitly discussed not having "democracy" in the United States, because it would give too much power to the people, and so they purposefully chose an election based system because it allowed for elites to retain control by using money to run campaigns (note also: "democracy" at the time referred exclusively to Athenian style democracy).
Consider thermodynamics: even without quantum weirdness, we can't compute/predict the micro interactions of atoms in a gas. But most average out, and we can make a lot of meaningful predictions on a macro scale.
Back to brains: even if there is some underlying quantum process that might free us from full determinism, on a macro level, it might not matter - you're still gonna value what you value, and make the same "choices".
And if in some cases a "decision" is actually impacted by some quantum effect... is it "agency"? Or just yet another external process affecting us?