I get you have a completely superficial understanding of the role of federal appellate judges, but holy shit do you not understand the implication of her statements.
Its not saying "I will follow the basic legal principles that are required of me, as an inferior justice of the united states of america."
Its saying "I will follow Roe v Wade and in doing so I will not vote similar to conservatives on the Fifth Circuit in Whole Woman's Health or June Medical Services." Even you should be able to comprehend that as an assurance she will not rock the boat on abortion, unless you disagree as to the Fifth Circuit's rulings in those cases.