@Ayaki this is nothing about generation.. I am 28yo woman, and also a teacher specializing in child development. In my country at least it is illegal to hit your kid, doesn't matter the age. And I can totally guarantee that no one needs to get hit to get discipline, otherwise us teachers would be spanking kids at school, but I bet one leg that no parents would like that.
@Sabrina welp thats ur country. Where i'm from parents encourage the discipline.. cuz they know da** well if their kid did something wrong and they didn't say anything, their kid would think that its okay and repeat that action, but this is unrelated to the manwha in anyway.