My impressions from the podcasts of actual law professors and lawyers is that there are various interpretations of the law that trend towards liberal or conservative values, and the strategic dressing of how the law is read is itself a political strategy to legitimize a political reasoning as an apolitical law analysis.
For example, the choice of a judge to read only the text and law as it is written (textualism) without caring about the general context as to why it exists or the effects of the law in modern day can often be used to ignore the actual injustice occurring as a result of a law that doesn't actually produce just outcomes even when the supposed intention is such. It's arguably pedantry.
But when the same purely text-based reading is applied for progressive arguments, as in the hearings for sex-based discrimination, the conservative justices have abruptly shifted their questions to be concerned about the societal effects (bathrooms) or the original intention of the law (originalism). This sort of flip-flopping of evaluation strategies is often used as a basis of argument that while there are multiple reading frameworks of law, the actual frameworks used are often for political/personal purposes and judges are proposed based off their conservative or liberal bent in analysis.