I'm not saying that alcoholism isn't an issue in Germany. However the data I've found says alcoholism is about twice as prevelant in the USA as in Germany. Healthiness of drinking behavior isn't all all or nothing thing but a spectrum.
Having a sober father may have meant that you missed out on more direct knowledge transfere from your parents. You still would have had some of that knowledge transfere indirectly via your peers
In the USA, due to the laws, underage drinking, especially in highschool, tends to be much more segregated in terms of age. Each generation of teenages has to learn how to drink while hiding it from their parents. In my experience this means that teenage drinkers in germany tend to be more aware of their level of inebriation and thus tend to not binge as hard. There is more of an expectation socially to keep your shit together while in the USA there's more of a tendency to celebrate and brag about losing control, especially among the young for whom it is more novel. It's also possible (indeed likely) that many of the Germans kids I knew started drinking before 16 and that accounts for some of the differences I observed.