During the Cold War at school and in offices there were air raid drills. There were fall out shelters on almost every block. There were all sorts of protocols to be followed in case of attack.
Kids lived with the fear of war and focused on survival.
If they had any kind of neurosis, they became a liability. They could not be allowed to jeoparidise the more important members of society.
Hence one tried to suppress their weaknesses. If they were afraid of something, they would hide or conquer it.
If there were heartbreaks, if there were accidents, they were kept as much inside as possible.
Before the Cold War ended, weakness was no longer hidden.