Central banks no longer want to take any risk with growth: This behaviour is very dangerous

We are seeing that the Federal Reserve, and even more so the ECB, no longer want to take any risk with growth: even when the economy improves, they keep interest rates very low and completely reject the " leaning against the wind " (implementation of gradually more restrictive monetary policies during expansion periods). The risk that central banks are taking in this way is too high: First, they can no longer stimulate activity if necessary, if growth slows down significantly ; Second, they let financial imbalances linked to permanently low interest rates appear without reacting : real estate price bubbles, uselessly excessive fiscal policies, leverage for financial investors, weakening of banks , etc. It would be far preferable if central banks , as in the past, took the risk of curbing growth after a few years of economic recovery.