These harm scores express population-level harm rather than individual-level "harmfulness." They reflect not only a drug's pharmacological risk profile but also the current policy context in Canada. The high score for alcohol underscores a failure to adopt policies to address alcohol-related harms, despite the known health harms and the existence of proven policy measures. More broadly, when developing drug policies, governments should consider the harm-both individual and societal-caused by drugs and by the laws and regulations that govern them.
Crépault et al. (Tue,) studied this question.