You can't debate the value of the term without considering the conditions that led to it. Why would someone call a postmortem "blameless"? Because (in some comp

You can't debate the value of the term without considering the conditions that led to it. Why would someone call a postmortem "blameless"? Because (in some companies) there absolutely was a culture of blame, which made people less forthcoming and thoughtful about the causes of incidents, which limited the potential learnings. This term was not pulled out of thin air, or built upon some imaginary possible blame. It was designed to explicitly remove blame that was already present in the culture.