Maybe, but there's clearly and consistently no correlation between enforcing said illegality and addiction: https://www.pewtrusts.org/en/research-and-analysis/issue-bri.... In both of the specific cases mentioned in the article and my comment, it's a lower jurisdiction stopping enforcement of a higher jurisdiction's laws. Marijuana is still illegal in Colorado, but everyone knows that the TSA are the only ones enforcing it.

There's also the fact that a lot of black-market stuff only ever happens because it's illegal, which is why countries that decriminalize prostitution and take a treat-instead-of-prosecute approach tend to see benefits in addition to fewer people in jail for the associated crimes. I know there are people that won't break the law, but there are also people that make beaucoup bucks breaking the law because they're good at it. Which one wins out? No idea. Not sure if there's a way to get data on that beyond the enforcement vs. addiction studies.