The south park’s point in that episode wasn’t to deny the existence of substance abuse disorder. Rather the point was that not everyone that does dumb stuff one time while drinking has it.

In this episode Randy didn’t have Substance abuse disorder. He took the kids for a drive after drinking. He was caught and the court ordered him to undergo treatment despite there not being any proof that he was an alcoholic.

This mentality that anyone that does something dumb or illegal while drunk has a problem does no service for either those that actually have substance abuse disorder, nor for criminal justice. You should be responsible for your own actions, and if you are sick you need treatment. But ordering people to undergo treatment after a crime despite no evidence of a disorder is just plain bad. mkay.