Earlier quoted context omitted.
I question how genuinely accurate that is. Drug use _started_ as illegal, and so many who have experimented and might have continued to casually use instead later on shied away. Alcohol started as a perfectly normal thing (until modern times, beer was considered a safer drink than water and no one ever considered restricting it to _anyone_) So, I'm not saying you are wrong - only that "Drug users are in contrast a di…
"Drug use _started_ as illegal" Sherlock Holmes was portrayed as a regular cocaine user, and occasional user of morphine. At the time in Britain these were legal. BTW, the "beer was considered a safer drink than water" appears to be a modern myth. See http://leslefts.blogspot.com/2013/11/the-great-medieval-wate... for a summary. It may be that beer was considered more fortifying than water.
More importantly, we are talking about people's _perceptions_ of these events and how they influence modern thought. Most of us are taught things like "the pilgrims served beer at the table instead of water". The reason for it, or whether or not it is even true, doesn't change that we all grow up thinking that "beer is no big deal - even the pilgrim's children drank it".
You could even extend that to Sherlock Holmes - it is subtle in the stories, but no one checks or cares if it was actually legal. We _are_ all left with the negative impression that he was a secret drug addict, who often disappeared for periods of time to indulge.