Powell has previously said that he wants higher unemployment. He believes this is the only way to decrease demand and bring down prices.
> The labor market continues to be out of balance, with demand for workers substantially exceeding the supply of available workers. The labor force participation rate showed a welcome uptick in August but is little changed since the beginning of the year. FOMC participants expect supply and demand conditions in the labor market to come into better balance over time, easing the upward pressure on wages and prices. The median projection in the SEP for the unemployment rate rises to 4.4 percent at the end of next year, ½ percentage point higher than in the June projections
> We’re never going to say that there are too many people working, but the real point is this: Inflation—what we hear from people when we meet with them is that they really are suffering from inflation. And if we want to set ourselves up, really light the way to another period of a very strong labor market, we have got to get inflation behind us. I wish there were a painless way to do that. There isn’t.
That is why the market goes down when low unemployment numbers are released. Powell will continue to raise rates until the labor market cools. He's not using the labor market to determine whether or not the economy can handle more rate increases. He's absolutely determined to increase unemployment via rate hikes.