What does it mean that the blame instinct prevents learning?

Focusing on who caused an error prevents understanding why it happened.

Example: A product launch misses its deadline by three weeks. In the retrospective, the VP asks 'who dropped the ball?' The engineering lead is identified — she missed a dependency in the project plan. She is put on a performance improvement plan. Six months later, a different team misses a different deadline for structurally identical reasons: an untracked cross-team dependency. The organization learned nothing because it answered the wrong question. It asked 'who failed?' when it should have asked 'what about our planning process fails to surface cross-team dependencies?' The first question produces a scapegoat. The second produces a systemic fix.

Try this: Recall the last error, failure, or missed expectation you were involved in — at work, in a personal project, or a habit that broke down. Write two columns on a page. In the left column, write the 'who' story: who was responsible, what they should have done differently, why they failed. In the right column, write the 'why' story: what conditions made the error likely, what information was missing, what system allowed or encouraged the failure. Compare the two columns. The left column ends at a person. The right column ends at a structure you can change. Time: 15 minutes.