Psychiatrist (and addiction psychiatrist in training) here. I agree that calling substance use disorders a disease is highly problematic. However, I think that while the majority of people who use substances don't have a problem, there are many people who use substances in a maladaptive (or disordered) way that dramatically impacts their ability to function, and we need a name to describe that. Substance use disorder is a pretty neutral term, and much better than the older "abuse" and "dependence" terminology for a number of reasons. The wording isn't intended to suggest that personal responsibility isn't required--and any treating clinician would quash that idea right away. It's a way to describe patterns and determine what might be helpful for an individual. It's certainly imperfect, but a much better description than past nomenclature.