Humour is one of the coping strategies that medical professionals use to deal with the daily emotional bungee jump. Without a coping strategy the amount of work and significance of the problems providers face would definitely drive many people to look around for a more relaxed job (Rheuma-holiday - as per the article?). Psychologists tell us that humour is a mature and constructive coping strategy. The article definitely shows the dark side of that.
The best coping strategy is seeing patients doing well though. Being in clinic when a patient returns satisfied with the results of treatment is the moment that many physicians use to power through all the tough times and long hours. Laughter is good, but patient satisfaction trumps all.