Psychological disorders develop when psychological problems continue for some prolonged time and the fixation of errors occur in the operation of psychology. It is rather an abnormal functioning of psychology than mental illness. 

When you accurately understand about values and meanings of life and learn how to control your own psychology, you can make use of psychological disorders as a source of generating happiness. 

In cases where psychological disorders are activated to promote happiness of yourself and people around you, you don't have to treat your psychological disorders to normalize your psychology. 

However, psychology treatment is necessary when psychological disorders are activated to destroy happiness of yourself and people around you. 

Therefore, the judgment on psychology treatment must be based on the operational direction of mind energy. 

In some cases, psychology must be normalized by applying proper treatment methods and in other cases, psychology must be only adjusted to accord with one's pursuit of happiness.

At least, you must not aggravate the situation by making yourself and others unhappy by activating errored psychological operations.