Why at all times young people were scolded for manners and behavior?

The older generation always strives to scold and teach young people. After all, everything was different for them, they do not keep pace with the changes. And everything in society is constantly changing: moral norms, rights, interests and priorities. It is a pity that there are so few adults who understand young people, but they are very helpful in building bridges between generations. These adults are constantly learning new things, participating in youth activities, and can explain things that the rest of the old generation does not understand. When we grow up, we will also scold the young.