This is an absurd argument because it inconsistently moves the value of giving credit outside of the realm of determinism. Since everything is determined then the concept of credit would become meaningless. It is not meaningless because it exists within the subjective world created from determinism.

Just like you can't say a criminal is not guilty of a crime without free will, because the concept of crime exists within the same subjective context as the experience of the criminal choosing to commit a crime. Choice and will still exist, they are just not "Free" in the sense of being determined by something outside of physics and its resulting emergent systems.

It would be like arguing that a waterfall does not exist and is not beautiful because if you look closely enough at it all you see are numbers representing the states of molecules and velocities.

Meaning does not require "free will", and the very concept of a will being "Free" is absurd since a resulting choice is either completely random (And thus not really anyone's will) or is determined by prior states and circumstances (the things that make you you) and is thus not really "Free".