Where's all the drug treatment and harm reduction?

I rewatched an old but good video on the war on drugs. And it reminded me, that tlaw enforcement is AT BEST 1 step ahead of some criminals. But that the criminal element is always rapidly adapting, and the best thing we can do against drugs and crime is to focus on the demand side.

We legalized the drugs, but didn't do the more important half of that solution, treatment and services for the drug users.

So, why aren't we doing more? Who dropped the ball? Are we doomed to just keep throwing more law enforcement at the problem?