The problem is not that jobs need it or not but HR and hiring manager use the fact that you have a degree to as an indicator of a few things:
1) You are able to stick with a project for a long period of time and see it through
2) You are able to accept and complete tasks that seem and probably are arbitrary and pointless because someone says do it.
3) You can take a set of instructions and fill in the blanks on your own and run with it, with something less than constant supervision.
There really is no better indicator of the above available. You might be able to accurately assess that stuff in an interview and you might not. A bad hire can be a costly mistake for a business. There are enough candidates for any given job with a degree right now, there exists no good reasons to gamble on someone without one.
In the current job market I would NEVER consider a candidate without a degree for anything a position above "cleaner" because there is no reason to take the chance, what you have a degree in is less of a concern though. You want to interview for an IT operations job and your degree is in "20th Century Art History" that is not necessarily a problem.