All the reasons why central banks do not want to prevent asset price bubbles

It is perfectly clear that central banks do not want to prevent asset price bubbles. Why? For many reasons: For fear of the resulting moral hazard; Because they do not know the “proper” level of asset prices; Because there is a conflict of objectives between asset prices and inflation, and between asset prices and unemployment; Due to the “Svensson” argument: because this would weaken the economy in growth periods and therefore facilitate financial crises instead of preventing them.