California used to have a medical marijuana program where access was supposed to be controlled by requiring licensed physicians to prescribe it. Turns out there's enough disgraced doctors to rubber stamp huge volumes of prescriptions, rendering the control a joke.
If the DEA isn't cranky, we go back to pill mills.
If you want to limit the availability of a substance, you can't rely on Responsible Professionals acting as gatekeepers- too many will take the money and run.
If the DEA isn't cranky, we go back to pill mills.