I know the answer is because the stock market is based entirely on feelings and doesn't have any basis in reality.
I mean, that's phrased really about as well as anyone could phrase it. You could also say that there are two Americas: the 1% and everyone else. The stock market is a measure of how the 1% are doing. When Bondi said "the Dow is over 50000!" in that senate hearing, she was basically just saying, "the rich people think this administration is great, so you should too."