Why do cultural conflicts occur between adults and young people?

Because young people think that adults do not accept anything in their life. Adults think so.
Half of the teenagers tell their parents to fit into their lives and not ask anything. Adolescents now have very increased maximalism and selfishness, even there is hypocrisy.
And adults, on the contrary, want only the best for their children or the younger generation.
After all, adults really need to obey, because they have lived longer than young people and I know that many teenagers have no idea what it is.
So, advice from relatives should be taken a little more seriously and not put pressure on your relatives or outsiders with your character.