Perhaps cannabis truly isn't all that dangerous, and perhaps if it partially replaced alcohol in our culture the net effect would be beneficial to all. But in my experience, drug users, or drug advocates in general aren't usually willing to even consider the societal aspect of the question. To me, the question is what is best for all members of society. To the people I've spoken to, the harm done to others does not matter since they're only 'doing what they want with their own bodies'.
Not considering the societal aspect? Are you kidding me? The folks who are advocating various levels of reducing or ending prohibition
are considering the societal aspect. When it comes to marijuana use, the greatest harm done is a result of prohibition, not a result of using the drug.
The societal aspect of prohibition prevents people from getting jobs even at places like hardware stores and fast food restaurants and landscaping companies if they piss in a cup and it turns out they've smoked marijuana. The societal aspect of prohibition has
everyone pissing in cups, being more or less required to preemptively defend themselves against an accusation of being pot smokers. The societal aspect of prohibition kicks kids out of colleges or prevents them from getting in if they've been caught with marijuana in their pocket. The societal aspect of prohibition confiscates land, houses, and cars from people who have a few plants growing along their back fence or a bag of weed in their glove compartment.
The societal aspect of prohibition takes parents away from their children and puts them in prison for buying, selling, or owning marijuana. The societal aspect of prohibition eats into the already limited resources of law enforcement, making
your life less safe by the way, because cops are sitting around trying to figure out how to discover some people buying, selling, smoking, or simply owning some pot that the cops,
and you, wouldn't even know about if they didn't work so hard to find out. The societal aspect of prohibition costs billions of dollars to pay those cops, lawyers, judges, parole officers, and everyone else who is chewing up
your tax money to pursue the failed war on drugs.
Everyone arguing against prohibition is considering the societal aspect. It seems pretty self righteous and hypocritical of you to go happily along passing moral judgment, advocating societal control over what people do in the privacy of their own homes, blaming the effects of prohibition on its victims, all the while suggesting that other people aren't considering the societal aspect. It's pretty arrogant of you to accuse others of ignoring the societal aspect while you yourself are neglecting the greater harm,
the societal aspect, which is directly caused by prohibition itself.