This is another good one. In fact, I saw a documentary on Prohibition that suggested a lot of voters didn't think it was really a liquor prohibition.
Add to it the vastly greater dangers of distilled spirits (both making and consuming of homemade varieties) versus brewing and winemaking and this could stick for a long time.
Culturally, a lot of the immigrant community's who loved their beer saw and hated the effects of liquor. Let the Croats and Italians have their wine and the Irish and Germans have their beer and they'll rat out the Anglo bootleggers for you.
'Course, breaking the saloon in general and the immigrant saloon in particular was half the point of Prohibition. Indeed, replacing the male saloon with the unisex bar was one of the real benefits of Prohibition.