This statement is not necessarily true because is about people's perception about drug and alcohol. Besides that this problems is actually and truly a social problem, many people don't think that. Common people tend to think that substance abuse is an individual problem that only affects to the person abusing alcohol and drugs.
Moreover, the reality is that substance abuse has a huge negative impact in the society. One example is the relation between substance abuse and crime, being drug addiction one of the most crime sources, due to the fact that illegal drugs exists. On the other hand, alcohol-abuse people often put in danger their friends or family by driving under alcohol effects. Lastly, substance abuse can end in chronicle diseases which can affect others.