The influence of politics on people can last as little as one day.

Even if laws are repealed, it takes 5-10 years for their impact to fade.
Culture needs thousands of years to disappear.
Because the feudal system is deeply rooted, Chinese people like heroes and embrace an officialdom-centered value system.
Meanwhile, things like polygamy, brothels, and prostitutes—although banned by law after the founding of the country—still operate underground because cultural influence persists; and in the future, as long as the system loosens even slightly, it will go back.