The dangerous side of this drive to discover stories is that we also mix this with our tendency to generalize experiences. Our mind creates stories that we believe to be true, but often the back stories are based on our assumption of what happened based on our own past experiences. This combination can lead to making general assumptions about people groups, or past experiences that are not only untrue but also cause emotional reactions that are not even remotely based on what actually happened.
Therapists are well aware of the way that the human mind establishes connection and how we tend to learn from our past experiences. Sometimes the stories we create in our own minds will mix with an old emotional trauma. When this happens it can cause what is known as transference or at times PSTD reactions develop. Transference is when one person creates a background story about someone else that is based completely on their own past history rather than being based on experiences with the person that they've developed emotional feeling or connection with. PSTD is a strong emotional reaction by a person who experienced trauma when exposed to a non-threatening stimuli that reminds them of a traumatic event. Neither of these responses are within the control of the person reacting, and often this reaction to trauma creates additional tension or difficulties in the lives of victims.
Unfortunately, these same traumatic experiences impact the way victims relate to people around them long after the crisis has passed. A person who seems fine may actually be struggling to trust because they assume people will hurt them, and this assumption is based on past experience of people hurting them. Those who are processing trauma and experience transference or PSTD are not 'broken', but instead they are simply using a tool that most humans use subconsciously to create stories. Traumatized individuals are answering questions about why someone does this or that, in the same way any human will to develop full stories based on past experience. Unfortunately, when past experiences happen to involve trauma it does influence the assumptions and stories developed. Victims are simply processing the unknown stories by filling in the blanks in the same way that all humans us past experiences to create stories. A victim is unlikely to assume the world isn't going to hurt them because their past experience says that the world does hurt them. A traumatized person is more likely to fill in the parts of the story that they don't know with reasons to distrust others or with reasons to explain why they are afraid of their environment.