Not everyone is born prescient. A man drinking his first beer doesn’t think he will become an alcoholic anymore than a man cutting up his first line of coke thinks he will be spending his entire paycheck on powder in 6 months. It may be his own fault that he tried it in the first place but he did not walk into the situation knowing he would become a burden to society. He can only hope that society will pay him the favor of having faith in him and offer him the opportunity to become a productive person again.
There is the crux of the matter. In the McCourt family (Frank, author of "Angela's Ashes," vs. Malachy, also an author and pub owner) it has led top a family feud. Frank says, "How can this alcoholism be a disease, when one can simply stop? So, stop." Malachy is a fervent 12-stepper and says, "You can't stop." Although he has.
So addiction might be the search for love and acceptance by behaving in a way that guarantees loathing and rejection. Makes perfect sense. Somewhere.