So you're gonna stick to your position regardless of the proof?
If you have proof, then my statement would read, "My "position" is that public acceptance of a product is unswayed by the fact that the product saves money by killing people off sooner.
The fact that cigarettes save money this way did not deter people from raising cigarette taxes, advertising against smoking, and banning smoking just about everywhere.
As an argument to legalize drugs, it's a poor one. IMO.