Alcohol is bad health wise but probably is used to reduce the harm of social imposed stress between people.

So, If I think about it "like alcohol", it would mean "what is the root cause of not being able to keep contact with people". It might be that common social mixing places are probably much fewer than hundred of years ago - be it the local bar, gathering after a day of work in the field, public bathhouse, etc. Many of activities in the modern world seem very individual - maybe that is the problem, and people being social try to replace it and get tricked into worse things.