I dont know what the nursing "culture" is but I agree with this. Nursing is a second career for me.
However, the practice of listing your degree behind your name is generally tied to a career where you are licensed and the degree is part of that license, ie MD or BSN, RN. So I would not put MBA behind my name upon becoming an RN, anymore than I would have prior to becoming an RN. Having an MBA is in no way tied to your licensing as a nurse.
Unless its nursing affiliated it appears a bit pretentious and silly to me.
Edit- A friend once told me. The only people who put MBA behind their name got their degrees from University of Phoenix. LOL