A shot - naming an illness invites a more extreme reaction?
Like - a bleeding mole will be lovingly, gently bandaged up until it is called a melanoma and then it is cancer. So agressive treatment is justified and excused,

Mental illness related to a cause can elicit sympathy - poor A, she went into such a depression when her mother died - as oppossed to - A has clinical depression. People tend to find a named illness justifies aggressive treatment and a 'has to put up with it' attitude, ok sometimes with the underlying sentiment of 'poor thing!' - but still.

Can't say I agree all the way, but its a thought often valid.