Concluding that catharsis of anger can't be therapeutic is incorrect.
You know the feeling. It's that rage you get when someone cuts you off on the highway; the one where you just want to floor it and flip the bird. Anger is a corrosive emotion that can run off with your mental and physical health.
Some 15 million Americans a year struggle with depression, an illness that comes in many forms—from major depression and seasonal affective disorder, to dysthymia and bipolar disorder. Depression is an illness that increasingly afflicts people worldwide, interfering with concentration, motivation and many other aspects of everyday functioning.