I agree with the above comment, but in many areas, there simply are not any or many full-scope CNM positions. So in that case, if you are faced with a choice between a job that doesn't use your CNM skills at all, or one that uses part of your CNM skills, it could be a wise decision to take what you can get.
The "problem" I personally have had in CNM jobs is that I am strongly committed to evidence-based practice. I took a job in an OB-CNM practice and in my interviews talked about how important EBP was to me. They all said, yes yes, that's what we do. And I came to find out very quickly that they (ANY of them) wouldn't have known the evidence if it hit them in the face. The CNM did what their "ancient wisdom" told them and the MDs did what the drug reps told them.
I have since interviewed for other CNM jobs, and found similar lack of dedication to EBP. At one job, it was all about "stripping" membranes starting at 39 weeks, and AROM in labor.
I hope to start my own practice within a few years. Meanwhile, I am working clinic, and taking call for another midwife at times, and teaching.
The argument many CNMs make for taking a triage-only job is that "the doctors will get to know you, and begin to accept CNM practice." Perhaps this works for some. In my area, there are numerous hospitals that have used CNMs for triage only for years, and they still don't have full-scope CNMs.