Because the author has researched the area and talked to people who know the land
The psychotherapy that addresses "the whole person" is the so-called humanistic psychotherapy. Instead of trying to point fingers at specific problems in an individual's life, it assumes a holistic view, taking the person as a whole instead of focusing on their particular aspects. Its goal is to empower the individual and strengthen their belief in themselves, as well as other people.
D. he didn't like the medium as no other comments could have stopped him.