Earlier quoted context omitted.
Or end the futile prohibition on drugs and tax them instead. Worked for alcohol.
For values of 'worked for alcohol' that include 'moved world's largest criminal organisation into non-alcohol-related activity without impacting its organisational capacity one jot'.
What illegal activity are you proposing people will seek if drugs are medicinalized/legalized? Saying "oh they'll just move on" is a bit hand-wavey.