Poor state = lack of security (under-funded police or over-burdened courts for example)
Prohibition = creates market incentives for violence and coercion
These reasons are 100% why economic intervention should always be answer #1 to violence and crime. Not more warfare or tough justice.
I'd even take this position beyond the war on drugs and apply it to the war on terrorism as well. As we saw in Afghanistan, what good was spending trillions on war when we leave them with a non-existent economy or infrastructure? The only massive industry there is now opium and funds are going straight to the adversary.
Same with the American drug war. Thousands of impoverished kids with their fathers dead or in jail on drug charges, no long-term career possibilities except an extremely accessible job market built on violence.
I'm not promoting pacifism, security is essential. But social/market liberalism, combined with creating economic support infrastructure, and investing in a strong legal systems against corruption (so it doesnt end up like Africa).
The only way practical justification for more war/justice is via some emotional gratification of getting 'revenge' on some unsavory class of people in society by the controlling class. Because how could the goal really be to minimize or stop the problem when the failures of that strategy are so obvious to anyone who spends a moment critically analyzing the history of it?