Borrowing from basic economic theory, where there is no demand, there is no need for a supply. We’ve proven that interdicting the supply does not work.
Perhaps we might be more successful in reducing the demand if we re-institute anti-drug education beginning in our schools, starting in kindergarten.
Perhaps we might be more successful by mandating intensive inpatient treatment for drug abusers, including long term after-care. Perhaps we should invest more money to educating children and treating the addicted. Of course, this is my opinion, I could be wrong.