Control of the threshold between the frontand backstage is part of the essence of professionalism. Why do experts keep concealed from others a good deal of what they do? One reason is quite straightforward: the exercise of expertise often requires specialised environments, as well as concerted mental concentration, which would be difficult to achieve in public view. But there are other reasons. There is a difference between expertise and the expert, which those who work at access points ordinarily wish to minimise as far as possible. Experts can get things wrong, by misinterpreting or being ignorant of expertise they are presumed to possess.

XREF: Connects to Goffman's frontstage/backstage dramaturgy and the sociology of professional discretion.

Anthony Giddens, The Consequences of Moderni…, loc. 207