Counterpoint: The war on drugs has been progressively ramped down since the late 90s. NYTimes wrote a long story about how during the feds quit using tactics such as convicted drug dealers to flip on their bosses, etc. We aren't putting as many drug dealers in jail and we aren't putting many drug users in jail. What you get is an epic rise in opioid deaths over the past 30 years and chaos on the streets of our cities.
Given what LA/SF/Portland streets look like with this eased-back war on drugs, it is possible the war was doing a lot.