Critical psychological development is gained early in life. Later, this may not happen even if the patient is provided the most talented of psychotherapist.
Change is difficult and some cannot tolerate the inherent dependency of this type of treatment. A teenager or young adult may need a firmer path in life before they can accept this childhood-like experience that they struggled to escape though there are great differences between the two. Unlike during childhood, a therapist does not make demands, even that of being liked. Their goal is merely that their patient's goals be achieved, so long as they are healthy and some of which they may be unaware.
Yet for some youth the completion of education through college or graduate school or technical training comes first. They must try to ignore their anxiety and depression until the better day when they feel confident that they can--independently--survive financially in the adult world.