Here getting emotional is not bad for you if you look at the case of anger. The more they are displaying anger, the lower the stress responses.

Having that sense of anger leads people to actually feel some power in what otherwise is a maddening situation.

Anger can sometimes be adaptive. We're showing for the first time that when you are in a situation that is maddening and in which anger or indignation are justifiable responses, anger is not bad for you.

Analyses of facial expressions revealed that the more fear individuals displayed in response to the stressors, the higher their biological responses to stress. By contrast, the more anger and disgust (indignation) individuals displayed in response to the same stressors, the lower their responses.