I think failure to use a process approach is a symptom, not a cause, and I would approach it as such. Reactive versus pragmatic thinking, immaturity of systems, cultural dysfunction and other factors can all contribute to what I'll call a paint-by-numbers QMS versus a more elegant, process based approach.
I have worked in places where nothing I could ever do would change them. Finally the management turned over to the yoiunger generation and, I expect, improvements came about in time. By the time that happened I had had enough and moved on to save my own dignity and sense of worth. But before I left, I handed the outgoing presiden't daughter my stack of p and n charts from a CNC process, and my calculations for ROI if they chose to enclose and climate control the space. She breathed a fervent "Thank you!" and I never saw her again.
Will the process approach save them money? Possibly, but it can be almost impossble to isolate a single independent variable and know that is saving or costing a company money. Oh we have the math and all those little charts, but human behavior remains the last frontier and chances are good that no matter how hard one tries to convert the heathens so to speak, it may or may not get done and they may turn out fine in any case.
I think we are making this subject way too complex and philosophical. It's not. Bottom line is, to maintain impartiality there is precious little a CB can do to promote the process approach. If that was not the case, it would get more than a wishful-thinking sermon in the Introduction 0.2.
However, to treat it as an added activity ignores what 0.2 is saying: the Standard itself promotes the process approach via its clauses and requirements. Even if they are just checking the boxes, a fully compliant organization will have the rudiments of a process approach regardless if it's got religion, so to speak. What it chooses to pursue from there is its own doing. Auditors can tell organizations when they get it right or wrong, why and by how much, but have the authority to do little else.