Because the deficient supply of self licking ice cream cones?
> so as to promote effectively the goals of maximum employment, stable prices, and moderate long-term interest rates
So half the time, the Fed is just some sort of con man, trying to trick the economy into doing what they want through press releases and optimistic predictions, etc.
The other time they are just slowing the economy down for good or bad reasons.
Many of the current shortages (industrial plant failures, food shortages) are due to climate issues. Putin isn't helping, but even without the Russia sanctions, we'd still be facing all sorts of shortages (PVC, microchips, olive/sunflower oil, wheat, mustard, water shortages blocking the Panama Canal, etc, etc).
The root cause of all that is climate change, which is worsening linearly with time, which means the backlogged impact on the economy is increasing quadratically.