OP:
drinking large amounts regularly or very large amounts occasionally (=binge drinking) is very bad for your health
however, drinking small amounts of alcohol regularly (for instance, a glass of wine with your dinner) has been shown to actually be healthier than not to drink at all
it is probably worth stopping to think about why this very moderate drinking worries you so much:
is it because you were not aware of the health implications as explained above?
or is it because of something unpleasant in your past that means any alcohol has bad assocations for you?
or is it for cultural/religious reasons?
or is it because your husband is actually affected by the small amount he drinks, e.g. becomes unpleasant or argumentative?
If the last, then yes you have a problem and something needs to be done. If no 2 and 3 then you need to have an open talk; your husband needs to respect your viewpoint but you also need to respect his. If no 1, just inform yourself.