Thanks for bringing this up. Now I don't have to.
Many drug users, they've found, usually kick the habit within 5 years. Many do so on their own, without formal rehab.
Other benefits include lower overdose deaths, and lower crime rates.
Drug dealers can't compete with established businesses. Product is purer. Crime rate drops dramatically as dealers no longer have turf to protect.
Countries with anti drug laws use them to enslave the citizens, especially the poor and minorities.