Consequences do not equate to causation. Of course, stress has consequences, not all of them bad. Blaming mecfs on stress is just the latest method of calling it "hysteria" or all in the head. Think of all the people in the world who have or have had incredibly stressful lives. They don't develop mecfs according to any pattern that could be correlated to causation. So holocaust survivors have more mecfs? Do all the children sexually abused by priests have more mecfs? The oddest thing is that most patients can't think of a reason for getting sick and some who do are simply implying causation from coincidence.