Heard of Portugal?
Okay, let's be logical here - If the war on drugs around the world has failed utterly with regards to being heavy handed on the dealers and users and this is indeed the case, why expend the unnecessary effort? It is a waste of resources that could be better used helping the drug addicts and removing them from the clutches of the dealers. It is really not too complex.
Dealers will never be out of business, quite right. Any dealer that gets taken out will be replaced by another ten. There will always be addicts and there will always be dealers so I ask, what the **** is the point of extra violence that demonstratively has sweet ****all effect in actually helping the problem?
Harm reduction is the sensible course here, not totally pointless heavy handed tactics, that do not work.