I myself was extremely irked that many of my progressive law school classmates were basically like Trump supporters in that they cared more about their desired policy goals and outcomes than the underpinnings of the law, and didn't have much of a value system beyond their ideologies. They would love to pack the courts with ideologues like conservatives have been fairly successful at doing.
But that was a minority of people. What's more, our professors were definitely not of the same mind. The prof I had for con law, for example, is a prominent, highly regarded young liberal intellectual who posed hypotheticals to challenge the class's liberal assumptions, chiding us with "you guys are good liberals right?" He also regularly attends FedSoc panels (the FedSoc chapter at Columbia is doing just fine btw).
She also simply fails to understand how unmoving and slow-to-change the law is. She presents it as much more fungible and modifiable than it is. Her pointing to Breyer re: preemptory challenges is dumb, and almost a counter-argument, given that Breyer is not a particularly ideological justice.
Weiss is an uncredentialed pseudo-intellectual who has latched onto a real problem, but who does not have the knowledge or experience to write competently on the subject.