This turns out to be false for addiction-class things like cigarettes, alcohol, and opium where a chemical dependency is statistically likely to form across an entire population. Oxycontin (for example) trivially overwhelms “I know my needs” and virtually the entire population is vulnerable, barring those very few of us with the anti-addiction adaptations (who then also tend to lack a working feeling of completion-success, which is a curse in its own right!). Most societies choose not to apply a Darwinian filter along those lines, as evidenced by the absence of addiction testing and culling at birth, so it doesn’t make much sense to consider that with adults, either — and as one of those few without the proper brain wiring for the rewards-addiction circuit, I have zero interest in a world populated exclusively by people with brains like mine. There are solidly good reasons we have these neurotransmitter systems and it’s a bad plan to winnow out those who don’t by applying an Randian ethos to drug policies.
Listing the three most addictive, dependency-inducing and mortally dangerous substances used by humans to temporarily achieve a stress-free mental state doesn’t mean cannabis belongs in the same neighborhood.
Simply denying regulatory authority over an intoxicant, as proposed by the devil’s advocate argument I replied to, is obviously incorrect: all intoxicants are intoxicating and intoxication carries a risk of addiction. Where to set regulatory hurdles versus illegalities is much less obvious, and worth considering, but it’s never ‘fully unregulated’ in a prosocial society; if one provides a substance of altered mind, then some subset of those altered will suffer addiction. That’s the downside of our relationship with poisons: sometimes they poison our willpower.
It’s not so simple as ”intoxicant” being addictive.
Many ”intoxicants” are inherently not addictive and may even help getting rid of other addictions (ayahuasca / DMT / other psychedelics).
Many things are not ”intoxicants” yet are addictive.
Addiction is a feature of human physiology. More specifically, FosB turning into delta-FosB seems to be the generic marker of any type of addiction, and it directly drives addictive behaviors when overexpressed in the prefrontal cortex.
The physiology is a result of millions of years of evolutionary adaptation, and while it must have correlated with evolutionary fitness at some point(s) and in some scenario(s), modern humans are surrounded by so many novel stimuli and ways of self-stimulation that we simply have not yet had the time to physiologically adapt to the situation where some of our addictions are not actually conferring true increases in our evolutionary fitness.
That our society’s economic strategy is effectively “how close can we skirt the line to serfdom and slavery” has no bearing on the devil’s advocate proposal of wholly-unregulated intoxicants that I’m replying to. The state will tend to deregulate so long as the intoxicant leaves workers inefficiently functional when they’re at work, but to strictly regulate when it impacts the job market; yet, neither of these tendencies have any bearing on whether we should regulate or not, they’re just inherent biases to be aware of when discussing our society.
As well, take care not to assume that to regulate is to make illegal, make medical-only, impose punitive taxes, etc. Sometimes the outcome of regulation is refusing to get involved — but even then, you do generally (at least, if prosocial societal goals are given sufficient precedence) see societies tend to impose some kind of either age limits or mandatory mentor or religious process onto intoxicants with regard to however they define ‘minors’, so that teenagers have to work for it, can be statistically discouraged en masse without tripping their biological contrarian responses, can be chaperoned by wiser adults, etc.