In Europe it’s more common to drink socially, in America it’s more common to drink to be numb. There’s a big psychological difference between a glass of wine at the family dinner table and a beer in front of the TV to forget about work, even if the amount of alcohol is the same.
The difference between social and indiidual drinking as an indicator for addiction is a myth. Getting drunk with other people regularly is equally a sign of addiction, like it is to do so by yourself.
The pressure many cultures have around social drinking in Europe are also indicative of that. It is not truly optional to have a drink in many contexts.