This seems more like an issue with how controlled substances are regulated. Maybe healthcare should be optimized for patients.

I see it as an example of stopping a crime before it happens by removing the ability of everyday people to even make the choice to commit the crime.

This seems necessary when the penalty for being caught after the fact is insufficient to stop people from doing it. Either because penalties don’t work in preventing behavior, or because current society has difficulty implementing sufficiently harsh penalties because it feels too mean.

Right but the criminal isn't the person trying to have their medicine delivered in this scenario. It's a compromise in the quality of the medical apparatus because the policing apparatus can't or won't do its job. A same medical apparatus should be independent of enforcement activities or else patients will always receive suboptimal care and services due to the now mixed goals.

Then have them delivered by the DEA.