I can actually answer this because I was addicted to pain killers, alcohol, and caffeine. I wouldn’t say that people who do drugs are “dumb” because often times drug use is the result of greater underlying issues. Many drug addicts started out as legitimate treatment, such as those who end up addicted to opioids as a result of medical treatment. Many get addicted through self-medicating due to untreated or poorly treated medical issues, this is commonly found with alcoholics. There’s countless other issues but ultimately addiction is commonly started with an untreated or poorly treated problems, which became worse over time.
I became addicted to painkillers to deal with an underlying nerve disorder and was getting high to deal with it. I was an alcoholic because I was in a toxic environment, the same environment where I was horribly abused most of my adult life. I needed an escape, so I started drinking and smoking unhealthy amount of weed. I got horribly addicted to caffeine because I was working overnight shifts 40+ hours a week and used caffeine to make it through the night. I was drinking like 3 to 4 Monsters a night to deal with that. My addictions were caused untreated issues and was made worse through my limited resources to deal with those issues. Once I started getting treatment and working toward bettering my life through those treatments, I was able to overcome my addiction. I also got help making sure I stayed off my addictions. It required a mix of help and bettering my own life. Still, it wouldn’t have changed if I didn’t have at least one resource helping me to begin with. That’s something I think people fail to realize. Addicts need help, they need support, they don’t need to be treated like shit for addicts.