Yes.
If we are to use more resources...because drug addiction is not the same thing as drug use. Principally, drug users are not addicted. For those who are addicted, as I just mentioned, it's often just a symptom, a consequence of having had a bad education, a bad family, or a bad context for life. So we have to tap into and act on these very causes of addiction, which are rarely the drugs per se.
A prominent scientist at UBC said if we eradicated every drug on the planet earth tomorrow morning, every drug addict would find another object of addiction, whether it would be gambling, sex, or whatever. So we should act on the causes.