OK, but lots of people would disagree with you, e.g., in the context of supervised injection sites.
Suppose it were unambiguously clear from data that (1) society as a whole and each individual were better off when marijuana was legal and tightly regulated; and (2) individuals would be better off not using marijuana. Would you then vilify marijuana providers? (I generally would not, although I would hold them to a stricter moral standard than I would for sellers of products that are generally beneficial to the user.) What if we replaced assumption (2) with assumption (2')?: 80% of individuals who use marijuana are better off (say, because they use it only socially and the negative motivational effects turn out to be small), and 20% are worse off (because they abuse it).
Suppose it were unambiguously clear from data that (1) society as a whole and each individual were better off when marijuana was legal and tightly regulated; and (2) individuals would be better off not using marijuana. Would you then vilify marijuana providers? (I generally would not, although I would hold them to a stricter moral standard than I would for sellers of products that are generally beneficial to the user.) What if we replaced assumption (2) with assumption (2')?: 80% of individuals who use marijuana are better off (say, because they use it only socially and the negative motivational effects turn out to be small), and 20% are worse off (because they abuse it).