Maybe you are just not aware of what you really deeply believe about it?
> but “demonstrating free will” is not one of them AFAIK.
Free will is not the main reason for posting. But it is one of prerequisites for assuming it is a meaningful activity.
Then explain what is "wrong" about it. When you write "I don't know what to write about it but it's wrong" indicates an ideological conviction which is not based on true developed thought process behind it.
Like explain for example: if you have no free will, why should I communicate with you? Why would that be interesting to me? Like talking to a wristwatch? It's certainly very complicated as well, but I have no reason to communicate with it as if it was my peer.
>If we only did things because of a roll of the dice
Who said anything about rolling a dice?