I submit that your problem is not with the definition of information technology professionals, but with questions where the only appropriate answer is For the love of $_DEITY READ THE MANUAL!.
A "developer" may ask an excellent question here by reading the documentation on the system in question, determining that there is ambiguity, and raising the point here for someone with more experience to weigh in on.
A
A "sysadmin" may ask an awful question answered on page one of the manual they never bothered to read.
Sadly
Sadly the latter happens more often than the former.
In terms of scope, I believe we have always defined our scope more narrowly than "information technology professionals", but more broadly than "system administrators".
The change to `Information Technology Professionals" came about as we started trying to attract more of the enterprise storage and high-end networking folks to the site: These professionals do not (typically) call themselves system administrators, but their areas of expertise are de facto on-topic for Server Fault because they are closely coupled to server administration.
Given
Given the choice, I think the more inclusive term is a better fit for the site.
