And I actually disagree with the premise that this contains no lessons or morals. Children are able to see clearly how ridiculous and ill-advised the behavior of these characters is, and so learn to recognize it in themselves and others.
Someone once pointed out that while Mickey Mouse is the mascot of Disney in the U.S. and the main character of the franchise, in Europe it was Donald Duck who became popular. Europeans like the flawed anti-hero, while moralizing America (sorry!) preferred the do-gooder know-it-all Mickey Mouse.