I’m well aware that there are Supreme Court justices who claim to believe that courts should not make law. And yet... they continue to make law every time they contribute to a majority opinion.

As to AB5, I’m not really educated on the particulars of Dynamex or the political process around AB5 to opine on why it’s been codified. There are many possible reasons, ranging from a desire to try to freeze the law in place, to, as you say a “noop.” This, too, is just a part of the system.