There is no double standard. The definition of a Medical Device is quite clear: http://www.fda.gov/medicaldevices/deviceregulationandguidanc...

Besides this not being part of the FDA's charter, what you're ignoring is that articles assist you (correctly or otherwise!) in self-diagnosis. An article does not in and of itself diagnose you with a disease or condition and thus can't by any stretch of the imagination be considered a Device.