I remember you saying that MOST of the peole who would take any potentially addictive drug will, at best, only quit when it starts to kill them, and that MOST of the people they'd interact with would be "defensless" old or disabled people or children.
That's the only attempt I saw to quantify the actul risk or effects.
No, I did not say most of the people who take drugs will only quit when it starts to kill them. They might decide they don’t like the feeling of getting high. They might notice any number of negative effects. They might quit because their loved ones disapprove. Or because they are afraid of jail time. Or because it messes up their work performance or study habits. Or because of the cost.
I also did not say that drug addicts only interact with defenseless people. I did say they defenseless people are the most susceptible to their bad behaviors. Obviously.