Why are some people very disgusted and disgusted with filial piety? Are they unfilial sons? Or do you have your own difficulties?
Because they think filial piety should be practical, not lip service, and they don't like being kidnapped by morality. It is not that they are all unfilial sons, but that their filial piety is not superficial, but action, not lip service, so that they don't hate and hate those hypocritical people.