Medical problems are taken seriously by the public. Thus if one wishes for political or other reasons to draw attention to, receive funding for work on, or eradicate a problem, it may be useful to give the problem medical status or a medical label. Those whose lives are caught up with the problem, including students of it, may be unwittingly biased toward giving it a high status label.
The controversial associations between obesity, diabetes and heart disease may be due in part to a desire of some medical researchers to eradicate obesity. Obesity is frowned upon culturally in the Western world. By giving it the status of a medical disorder and interpreting research results to link it to disease, the medical profession justifies a war on obesity and its treatment with drugs.