[maxerickson]

Many illegal drugs are actually dangerous, so you need legalization and some mechanism to shield them from liability.

They also already sell many analogues to illegal drugs under prescription, so you have to look at whether a legalized market would be a better business than the one they currently have.

[TeMPOraL]

You're right. As long as there are limits to access to drugs, there will be some market for getting them illicitly - even if for convenience reasons (say, getting prescription drugs without a prescription). The question is, whether that market will be big enough to support organized crime the way the war on drugs does.