Earlier quoted context omitted.
There doesn't seem to be a safe lower limit for alcohol, its a well-known very potent carcinogen. Its not obsessive at all to completely avoid such a cancer inducing substance, especially if there is a family history of problems linked to it.
"Very potent carcinogen" is scaremongering and alarmist. Don't drink if you don't want to, but tone down the retoric a bit. Generations upon generations of Germans have enjoyed beer in moderation, and they don't seem to have higher cancer rates than other western countries.
Cancer in western countries are in general the highest compared to other cultures, so having an average rate among the highest in the world is not saying much.