Answer:
The most common reason is avoidance.
Explanation:
When people go through a traumatic experience, they associate feelings of stress to it. Avoidance is a behavior that aims to prevent a person from feeling distressed again. That is the most probable reason why your friend never mentioned surviving the hurricane. They did not want to relive that experience and the distress it caused them. There are other forms of avoidance, such as using alcohol or self-medicating to lessen anxiety.