Legalization isn't meant to solve the problem of drug use/abuse - that can only come one soul at a time - but to end the problems created or worsened by drug illegality, notably the hyperinflation of drug profits and channeling of those profits into criminal and terrorist hands.
The key thing I do not want is companies advertising and producing more addictive drugs and further mainstreaming recreational drug use. I’d be happy to apply the same kinds of constraints as those involved with the misuse of prescription drugs and penalties similar to those involving alcohol abuse. I’d like to see on a state by state basis how legalization effects cost. I’m familiar with the Netherlands model and even they still prosecute large scale drug dealing, import and export and merely have a “non-enforcement policy” against what are considered “soft drugs”.