Compounding adds cost and turnaround time. Not all pharmacies do it. Rules saying all repeats have to be filled by the same pharmacy can prevent compounding if that pharmacy doesn’t do it

But there is no rational reason why a pharmacist shouldn’t be legally allowed to dispense a patient with a prescription for a controlled substance with a lower dose than prescribed. Prohibitions on them doing so are just pointless bureaucracy which have nothing to do with preventing addiction. They achieve nothing except harming patients

There is no pharmacist near me that will perform this, as far as I know.

And I actually only learned that this was possible from a comercial I saw yesterday (Im out of town currently) weirdly enough.