While the other parks at Walt Disney World had always offered adult beverages, Magic Kingdom was kept dry, seemingly as a tribute to Walt Disney himself and the way he wanted his parks to be.
While Walt did not live to see Magic Kingdom open at Walt Disney World, this rule was kept in place, and it lasted until 10 years ago, when Magic Kingdom began to serve adult beverages in some restaurants.
People have come to terms with having alcohol inside Magic Kingdom and Disneyland so adding liquor to the beer and wine list probably won’t raise too many eyebrows.
Although it took years after the introduction of beer and wine at Disney World for all table service locations to get it.