I think it makes sense that people who, due to trauma or other lived experiences (in addition to those who are genetically predisposed), have a brain chemistry

I think it makes sense that people who, due to trauma or other lived experiences (in addition to those who are genetically predisposed), have a brain chemistry that leaves them not feeling as well as they could, would be more vulnerable to getting addicted to substances that make them feel better (or ”normal”, even).