We are not water. We are only rational being doing specific thing in a situation. The problem is that we , as a rational being, do the same thing if we are exactly in the same situation hence the act of punishing people or accusing them is wrong.
Don’t you see that, if you are right and there is no free will, those who punish people or accuse them cannot act otherwise, precisely because they are not free?
Person A kills someone and is arrested immediately by person B.
Person A says, “why do you arrest me?, as I am a rational being and I was under X circumstances, I could not do anything but kill that guy”.
Person B responds, “why do you complain?, as I am a rational being and I am under Y circumstances, I cannot do anything but arrest you”.
And B conducts A to the judge.
The judge condemns A to death.
Person A repeats the same song, because he is a rational being, and he cannot act differently: “why do you condemn me?, as I am a rational being and I was under X circumstances, I could not do anything but kill that guy”.
The judge, who is also a rational being, responds: “why do you complain?, as I am a rational being and I am under W circumstances, I cannot do anything but condemn you”.
Do you see?