A central bank, relying on the best available economic forecast which predicted a mild slowdown, implemented a small interest rate cut. Six months later, revised data shows the economy was actually entering a strong boom, and the rate cut is now seen as having contributed to rising inflation. A commentator states, 'The central bank's decision was clearly wrong and demonstrates incompetence.'

Explain why this commentator's judgment might be unfair, focusing on the fundamental challenge inherent in using economic forecasts for policymaking.