Lets try the prohibition again.
We have forgotten much. People still are convinced that the federal governments job is to control what we consume.
FWIW, I believe drugs laws should be on the state level. The government is not trying to control what people consume, except to the extent that that consumption causes harm to other people.
If I were your next door neighbor, I’m sure you wouldn’t want me to use my house as a poorly run explosives factory, with little or no safety standards. There is a good chance I wouldn’t have an explosion that would destroy your home and kill or injure members of your family. So, the government would have no right to shut me down, right?
A drug using neighbor is a lot like that explosives plant next door. There is a very good chance his drug use is going to blow up in his neighbors’ faces, and cause them great harm.