Even if heroin was sold at the grocery with alcohol and tobacco you would still get roughly the same number of people injecting themselves. Just because you can access all the alcohol you want doesn't mean you'll become alcoholic, same deal, not everybody is capable of becoming alcoholic or go for heroin injection I don't think the number of alcoholics suddenly exploded just because the prohibition era ended https://vinepair.com/wp-content/uploads/2017/03/chart2.png https://ahauk.org/wp-content/uploads/2020/11/image.png