It seems to be well appreciated by policymakers and investors that the system is ill-prepared to cope with another financial crisis. It is understandable that so many are concerned that the end of the business cycle could trigger a financial crisis. In practice, it seems like it has worked the other way around. The financial crisis triggered the Great Recession. The economy previously contracted when the tech bubble popped.
Similar thinking emerged after WWII. The fear of a return to the pre-existing depression conditions and the threat of the spread of communism shaped both the