The fed will juice to keep employment up and tighten to keep inflation down. They will not support stocks at the expense of those mandates
And I'd imagine the stock market is still fairly confident that rates are going back down. If we look at a chart of fed interest rates [0] the statistical evidence suggests we're going to see low rates in the near future. It'd be nice to buck the trend and have the US stay focused on prosperity but there isn't much evidence of it yet. The basic plan of high debt then inflating the debt away hasn't changed.
So instead the Fed aims for a small amount of inflation. That way when they miss a bit, we still stay out of deflation. It is much better to bounce between 2% and 3% than between -1% and 1%.
If the goal was actually to inflate the debt away, they would be aiming higher. Proof: the debt has been growing in real terms, not shrinking.
[1] https://www.federalreserve.gov/economy-at-a-glance-inflation...
Unfortunately government intervention makes it even more unpredictable when that will be.