"Won't somebody think about the the children??"..Yeah, liquor stores/dispensary card people, drug dealers/cartels/pimps do not. Stores pay taxes, follow regulations, buy permits..Dealers/cartels, etc do not. With regulations, quality and purity are not issues. Accidental over-doses and poisoning will decrease. Crime will drop. (With few exceptions, you do not hear of people committing crime to support alcohol/tobacco addiction) Remove the money from the shadows, corruption, prison industry(legalized human slave labor), law enforcement...and apply it to rebuilding infrastructure. Treatment instead of incarceration.
Prohibition creates a demand. Demand creates a black market. Black market causes corruption and misery. All while having a polarizing and divisive effect on the population. Creating an "us against them mentality". People are much easier to control when they are divided.