Because, as you’d have noticed, when the Fed raised its key rate, the central banks of many other countries would also follow to prevent capital outflows.
The central bank sets the lending rate that commercial banks try to match. If the central bank does not target a rate, then competition between banks to lend out their excess reserves will quickly cause the interest rate to fall to 0% (which can be a good or a bad thing depending on your perspective/economic doctrine).
If the Fed lowers key rate as inflation goes down, then China’s central bank can also cut its rate, then other commercial banks can follow, and local governments will now be able to borrow cheaper to pay back their higher interest overhanging debt.
Don’t you know that Afghanistan is full of religious fundamentalists and that’s why all these backward people DESERVE to be bombed?
Saddam was a bloodthirsty dictator and that’s why half a million Iraqi people dying is a price that is WORTH paying for toppling his regime.
Putin’s war in Ukraine is objectively 10 times WORSE than the entirety of Hitler’s regime during World War 2.