I understand where you are coming from here. I don't think we necessarily write well when we write to process something (though some may). For the people I work with, the therapeutic element is merely in expression, regardless of what that expression looks like. It is a place where they can say what they want, however they want, and take as much time as they want without someone getting impatient or critiquing how they express themselves. I actually encourage them not to worry too much about how it comes out, because they aren't writing to be seen by anyone else. In that context, I have found some benefit.