The problem is that "IT" is far too general a term that covers hundreds of different specialities, both technical and non-technical combined.
Someone working on a Service Desk logging calls over lost passwords is just as much IT as is someone Project Managing an eGovernment project or someone designing a multi-organisational identity management framework, and herein lies the problem. Not enough is being done to differentiate between the "white collar" and "blue collar" elements of 'IT' and the way they manifest themselves in practice.
The SFIA foundation tried to make a start, but failed miserably when they tried to align their levels based on job content and did not allow for cross-qualifications properly; also, the levels are incompatible to each other:for example, Research Level 5 is a typical description of the average Lecturer/recent PhD graduate, yet a Level 5 programmer can be without formal qualifications, know many different languages but be otherwise not very useful.
Perhaps practice ought to adopt a more academic view over "IT" and group IT types more along the academic separation of "Computer Science" and "Information Systems", perhaps adding the group "Support Services" (your regular helpdesk/cable monkeys). However, the typical amalgation of several different jobs (e.g Lead Designers doubling as Senior Programmer, BAs doubling as PMs) would make this difficult also.
Of course, another issue is with people's perception of their own careers as well - a lot of low-level IT technicians would consider themselves as white collar, even though their language, behaviour, and professionalism is more reminiscent of blue collar type people and they employ little specialist skills.
Many people in those type of jobs will probably be upset at my taxonomy (lots of them frequent the boards after all

) but similarly I'm sure that people at the other end of the spectrum feel a bit aggrieved at being tarred with the same brush as the guy carrying cables, when they are doing things which are much more advanced.
It is undeniable that IT is so varied to require more specific labels though, whatever they might be.