Thought I’d give a shout-out to this article, where they talk about some of the reasons people choose to walk out of their lives. The information was obtained through interviews with Australian people who had done this and then returned. The article notes that
Nearly all missing persons (97%) return within two weeks, which causes these cases to be seen, by both the public and police, as simple search operations. Viewing missing persons in this way ignores the underlying issues that trigger disappearances, making prevention strategies more difficult to put in place.
Most of the people who were interviewed said they left during “periods of distress or poor mental health, as well as in response to trauma in their families.” Half of them returned of their own accord and half were found by the police. Support services ought to be provided when they get back, but rarely are.