Well, not quite. The reason why the drug wars got started wasn't because of addicts or petty crimes. It was a form of class warfare because they wanted the dirty poors and minorities to stop using their poor drugs.
The history behind the War on Drugs is very explicitly a one divided on racial grounds and a cursory look at things like the legality of marijuana or mandatory minimums tells the full tale.
If this were true, how did the drug laws passed in the 70's hang around for so long? If there was no reason but racism, why didn't Obama, who in his first term had super majorities in Congress, simply wipe them away? You take away the agency and voices of people who live in crime ridden poor neighborhoods which suffer the consequences of high levels of addiction.
In the capital of my state, in just the last few weeks, we've had people high on pcp attack cops (after strangling his girlfriend), shoot at traffic, and pick up a child out of a stroller and slam them on the ground, all unprovoked. Those victims aren't racist in wanting to not have to deal with people high out of their minds.
You're essentially asking why Obama, a fairly centrist liberal by many accounts, didn't end racism forever.
There's a very good reason why black people are disproportionately arrested for drug-related crimes, especially Marijuana, despite having similar usage rates as others.
There's also the fact that members of the Nixon administration outright admitted this fact.
The reason Obama didn't do anything isn't that he's not that worked up over racism, it's just not as simple as waving your hand and saying everything would be great if it only for those racist laws. Drugs reduce inhibitions. People with reduced inhibitions do crazy things, often hurting other people. Families are often willing to support draconian measures so that their kids aren't endangered by some random stranger in some drug induced state of manic paranoia.
Ok so if the only goal of the war on drugs is to arrest people then it's working splendidly. Increasing crime is part of the package rather than an unfortunate side effect because it lets you justify even more arrests. Since the war on drugs does not have improving our society as a goal there is no argument other than racism that could possibly be in favor of it.
The addiction/dependence and public littering problems caused by drugs can be solved with prescribed low dosages which would be administered by a medical professional, not with a prison sentence.
That John Ehrlichman [0] really lives up to his name.
The history behind the War on Drugs is very explicitly a one divided on racial grounds and a cursory look at things like the legality of marijuana or mandatory minimums tells the full tale.