In my experience, there is a thin line between "blameless" cultures and "responsibility-less" cultures. Blameless cultures accept that we are all human, make mistakes, have off periods, etc. "Responsibility-less" cultures are as you describe -- they eschew honest conversations about the actual forces that affect projects. Instead they tend to repeat the same process discussions ad nauseum, typically discussing symptoms rather than the actual causes.
Since we as humans often prefer to avoid conflict (sometimes at all costs), it's not uncommon to see companies tilt towards the latter. This is exacerbated in "scale up" environments when rapid personnel changes make it difficult to build the kind of trust necessary for direct, honest communication.
Since we as humans often prefer to avoid conflict (sometimes at all costs), it's not uncommon to see companies tilt towards the latter. This is exacerbated in "scale up" environments when rapid personnel changes make it difficult to build the kind of trust necessary for direct, honest communication.