Writing, as I write in this semi-oral fashion here, is as it is for everybody, a product of brain chemistry, blood, the way our minds work.  For some the need to get up and write out all the drivel of thoughts and mental flickerings is like holistic medicine.  It readjusts the dopamine levels and provides relief to people who would otherwise venture toward depression, schizophrenia and other mental ills.

That's really the primary goal of it, so that you feel normal with yourself, that you find a place to vent out all that makes you anxious.