The education in ancient times was much stricter than the current education model. At that time, people paid attention to education, especially the loyalty of some families to culture. They have very high demands on their children, and they can learn the knowledge in the Four Books and Five Classics from an early age.
Modern people have lower requirements for their children, because parents love their children and don't want them to suffer, so no matter what their children do, they won't blame them too much.
Because of this, with the great difference between ancient and modern education, many children are unwilling to accept the culture of the ancients, and generations have forgotten the cultural heritage left by their ancestors.