Something anyone with an addict in their life needs to know:
While substances can efficiently help someone destroy their life, keeping them away from drugs won’t stop them from destroying their lives. There’s something already broken in these people that they need to fix before it’s too late.
There are perfectly legal alternatives that can be just as effective with a little more effort. Putting heroin in your arm is just quicker than downing a fifth of vodka, or chasing dopamine at the dog track.
I think you're advocating for better mental health care and rehabilitation of addicts, which I agree with. However, the idea that addicts will destroy their lives regardless of whether they stop using, or are forced to stop using, their drug of choice is an extremely dangerous statement. Many addicts get better by changing their environment and quitting/going to rehab/etc.
Furthermore, heroin != vodka in terms of how addictive it is for the average user, and that's partly why only one of them is legal for recreational use.
Controversies about decriminalization aside, harm reduction exists as a studied component in addiction, public health, and psychology circles for a reason.
Yeah, I don't know. There's certainly people that are just broken, but reading other examples, I think there are plenty of people who just happen on to a perfect addiction(, or maybe an imperfect one that fills the spot). The manifest destiny stuff is kind of a mix that soothes a lot of people with various motives whether or not it is representative of the median case.