I don't know. Libertarian drug advocates keep saying it's merely the druggie's private, personal choice to be a druggie and no one else's business (except his dealer's business of course.) Many people believe this.
Set me loose on a chaos-binge of drug-pusher killing and I could rid this entire county of drug-related crime in 5 days. Flat. That would last for about 90 days and then new guys would move in. About 3 cycles of that and that would end, too. General crime would drop 80% and you could let go half of the police force and about 60% of the probation and parole officers.
Of course, I do not advocate for killing Americans without due process and appeal, so it’s moot.
We know who pushes and sells (and uses). The problem is that the courts are slow and their hands are tied, politicians place the cost of incarceration over the safety of the community, and the sentences are not carried out (i.e., trafficker gets 10 years in State, but is paroled after two or three and is back out selling).
For 85 out of 100 users, crime and drugs go hand in hand.