So the following should be illegal too:
Knives
Carrot family (poison hemlock is a plant of the carrot family and none of the plants in the family are good medicine)
SSRIs (an overdose or stopping abruptly can be terrible)
Wood (if clopped on someone’s head can kill them and it isn’t the right medicine)
Bananas (slipping on a banana peel can be dangerous, plus it is not the right medicine)
Marriage (can end in divorce and destroy someone, and is not the medicine people need to treat illness)
Tea (unhealthy if smoked, and doesn’t cure cancer)
Fire (can destroy and is not the right medicine to treat any illness)
Cotton (about as effective as hemp in destroying people and less effective than marijuana as a drug to treat illness)
Cars (Can kill people, are not a safe or effective medicine to treat illness)
Pokeberries (Toxic to humans, no medicinal value)