[glymor]

You would have been better off actually reading what she wrote rather than knee-jerk reacting.

She's writing about the fact that expressing an emotion is bidirectional. No longer expressing that emotion will cause it to pass quicker.

You're talking about relieving stress by doing something physical and/or violent (both have been shown to work).

Unless you are punching that bag with a look of utter disgust on your face the two scenarios are unrelated.