Drugs are a fascinating topic in my opinion, because they have affected humankind and it's decisions since ever and more than anyone wants to admit. It's a topic that is everywhere, and that simultaneously nobody has a clue about (a bit like climate change or high finance). People don't know which drugs there are, how they work, how dangerous they are, how much they are used etc.

I talked to many people who are affected by the topic: teachers, psychologists, doctors, concerned relatives. I keep telling them: Even in this rich city Vienna, drugs aren't something that pops up in dark alleys behind trainstations, drugs are everywhere and used by functioning people you had no idea about. And they use massive amounts.

There are doctors who say that they tell their clients, that it's ok to smoke one or two cannabis-joints a week. What they don't realize is that a regular smoker (which might be a 13-year-old) doesn't smoke one per week, but more like 5 joints a day.
This is a point which get's more important now that states around the world are legalizing cannabis. It really isn't very hazarous, in the sense that it kills you or makes you unable to function, so people can get used to smoking excessive amounts. But: every psychoactive substance you take constantly will, by definition, change you. When usage-patterns get to the "all the time"-category most points doctors and legalization advocates make become invalid, because now it's not about side-effects of a drug you take now and then, but about the effects of a permanently altered state-of-mind you "cultivate".

I regulary ask sellers at highway petrol stations which cigarettes and smoking-utilities they sell the most. There was not only one time where their answer was: long rolling-papers and the lightest tobacco = ingredients for a joint.

LSD isn't just something out of a Beatles song, some people told be they had tried it with 15, because they could get it at their (noble high-society)-school. There were hooligans at a big local football/"soccer"-stadion charged with possession of it.

The issue/problem of cocaine is interesting, because (like cannabis) it is one of the few drugs that permeates all of society from blue-collar-workers to high-society.
I once helped a completely confused guy in a smoking to get a taxi home, who stuttered that he lost his purse while getting high on cocaine on some actor's party. He is a painter and a director at one of the famous theatres here, and gifted me a painting he had with him for the taxi-fare I paid.

I once saw two truck-drivers delivering goods to the local supermarket around the corner, snorting something of a magazine at 6.30 a.m.

It's a bit hard to get data about mass of cocaine consumption in the US, but estimations are about 200 tons (400k pounds, please adopt the metric system!) per year. They regularly find unmanned submarines who can transport tons of cocaine. Some of them are sophisticated enough that they might be able to cross the atlantic. Think of the R&D involved there, that cartels have the money to buy.

One of the problems in the vietnam-war was that Vietnam was and is a big platform in international drug-trafficking and many US-soldiers got addicted to heroin while trying to "get away" from the war. Estimations are that more than 40.000 soldiers were addicted. Many of them probably still are, no matter what some people say, it's close to impossible to get away from heroin/opiates. The only easy way to deal with the poor addicts is provide them with their stuff until the end of their lives.

Afghanistan was (still is?) the largest Opium and Cannabis-exporter in the world. Since they don't have many other goods than that, in the 90ies the US more or less allowed or tolerated the drug-business there, so the warlords ("afghan resistance") could buy weapons to hold back Soviet Russia.
So, in the war since 2001 US-money flows to both sides of the conflict. US-soldiers are paid to fight against warlords who get their money from selling their heroin in the US (and in the rest of the world). Isn't that ridiculous?

[..insert many more anecdotes and hair-raising numbers..]

To sum it up:

* Drug use is way more excessive than society is comfortable with.

* Drugs aren't mostly used while sitting on the sofa, they are used while working, while riding vehicles, while doing anything really.

* Almost everything people know about drugs (from names to numbers) is incorrect (if they know anything at all).

Disclaimer:

* Numbers above might be inaccurate, because I don't have time for proper references, but the magnitudes should be correct.

* This is not an opinion about how to work with the situation (i wouldn't call it problem, since drug-use has been always there, it's a property/corner-stone of human existence), I have opinions about that, but it's a very complicated matter. There's also a difference in advising addicted individuals and their relatives, which is (depending on the drug) relatively easy, and finding rules/laws for society at large.