I agree that no economist can actually predict and fully explain the economy. Because the economy is so big and complex that no human, no team of super smart humans with super computers to help them could ever accurately know everything they would need to know to manage an economy. But I think you're being too hard on the Austrians. A BIG part of the Austrian school of economics is pointing out that economists DO NOT have all the answers, in contrast to the Keynesian school that elevates economists to god like status.