In a short piece discussing shyness vs. Social Anxiety Disorder, Dr. Kristy Dalrymple has this to say (my bolds):
A “disorder” is a socially constructed label that describes a set of symptoms occurring together and its associated behaviors, not a real entity with etiological homogeneity. Labeling emotional problems “disordered” assumes that happiness is the natural homeostatic state, and distressing emotional states are abnormal and need to be changed. A diagnostic label can help improve communication and understand maladaptive behaviors; if that label is reified, however, it can lead to assumptions that the etiology, course, and treatment response are known. Proponents of the diagnostic psychiatric nomenclature have acknowledged the dangers of over-pathologizing normal experiences of living (such as fear) by way of diagnostic labeling.
That's what I've been saying for years, but she says it better.