I essentially agree. I'd just say that rocks are definitively less self-motivated than humans.I'm saying it's just as possible that our choices have no free will behind them, just like the rock doesn't.
We're just sorting out the meaning of the term 'free will'. If our thoughts and actions are determined by antecedent events, then I agree that 'free will' is something of a misnomer. Sometimes our thoughts and actions are more effectively, or more obviously, determined by external events and conditions, and sometimes, apparently anyway, more by internal conditions or principles of action that we call our own.
This is saying the same thing I think. Saying that we make decisions doesn't mean that those decisions aren't determined by our internal and external histories.That we simply experience the process decision-making but don't actually make the decision.