Earlier quoted context omitted.
Why do you equate physical force and prohibition to helping people? Why not start a private fund/charity, which, for example, helps addicts beat their habits? Or maybe distribute accurate information about drugs and drugs-related programs? Coercion isn't the only way to help people. And absence of coercion isn't "every man for himself"
It's clear that drugs are destroying people and communities. Take crack as an example. Do you really think making it freely available, or providing free soup kitchens and mecical aid, would alleviate the misery and destruction it causes to people and communities? Sometimes people need to be protected against themselves, this is particularly true for the less educated (which tends to coincide with the underpriviledged…
Drugs are mostly destroying people and communities because they are illegal. Maybe if your dad went to prison for an ounce of weed, you would have a different sentiment.
When a drug can be produced in a sterile environment, you can yield greater purity and an overall safer product. Not to mention when drugs are legal people who are addicted are more apt to seek treatment. You might be surprised to hear several countries are treating heroine addictions via making heroine available under a controlled environment where addicts can seek help. They're seeing great results. [2] Also make sure to look at [1] to see how much HIV rates have dropped in Portugal because of decriminalization of drugs like heroine.
Do you want to ban alcohol, tobacco, stairs, cars, and swimming pools in the name of people you deem incapable of making wise decisions? You have no right to tell someone what they can put in their body or do to their body. Give people unbiased information and let them make their own decisions.
Stop making the assumption that people aren't going to do drugs if they're illegal. That's not true. Lower-classes, particularly poorer African-Americans have been devastated by the drug war. See the book the New Jim Crow laws for more information regarding this. If you're a young black kid with an ounce of weed you're probably going to jail, where as if you're a wealthy white executive who lives in a private gated community and happen to have a few grams of coke and you get caught, you'll get a fine and a slap on the wrist.
[1] https://news.ycombinator.com/item?id=5951290
[2] http://www.time.com/time/health/article/0,8599,1926160,00.ht...