Prudent move? It's the only move. If it's either that or a recession, then they will do it, consequences be damned.
Would it not be better to face some of that pain now?
Now, they have recently done basically what Trump asks. Are they succumbing to Trump's pressure, or is Trump asking them to do what actually is the right thing?
The US could just cut interest rates whenever the stock market goes down. There's no real limit to how low they can go, and as long as the investors understand that the Fed is backstopping them they'll contribute in pumping it up.