That is his point. He is saying that while the generic definition of binge drinking [X drinks in Y time] shows an increase in those problems, it does not paint

That is his point. He is saying that while the generic definition of binge drinking [X drinks in Y time] shows an increase in those problems, it does not paint anywhere near the whole picture. Instead, he argues, a more important factor is the context in which those drinks are consumed and this context should have the most importance.