Because technical communication involves the knowledge of technology, expertise is associated with anything practical. I've come to think about this battle in terms of what my colleague Allan Heaps used to call the PageMaker Guy. In practical terms, the PageMaker Guy is the person in an organization or a group who 'knows' how to use technology, who can fix other people's technological messes, or who sacrifices valuable research time helping other people use technology. The PageMaker Guy is a phenomenon for which a person is anointed. Those of us in 'PageMaker Guy' situations often resent this role because it subsumes our identity to the extent that we fear our colleagues might ignore the depth of knowledge necessary for this role as well as our equally deserved scholarly accomplishments.
Bridgeford, Tracy. CPTSC Proceedings (2003). Careers>Academic>Workplace