To clarify

Start with a couple quotes from Casey:

It must be stated at the outset and with clarity that Roe's essential holding, the holding we reaffirm, has three parts. First is a recognition of the right of the woman to choose to have an abortion before viability and to obtain it without undue interference from the State. Before viability, the State's interests are not strong enough to support a prohibition of abortion or the imposition of a substantial obstacle to the woman's effective right to elect the procedure. Second is a confirmation of the State's power to restrict abortions after fetal viability, if the law contains exceptions for pregnancies which endanger the woman's life or health. And third is the principle that the State has legitimate interests from the outset of the pregnancy in protecting the health of the woman and the life of the fetus that may become a child. These principles do not contradict one another; and we adhere to each.

[W]hen this Court reexamines a prior holding, its judgment is customarily informed by a series of prudential and pragmatic considerations designed to test the consistency of overruling a prior decision with the ideal of the rule of law, and to gauge the respective costs of reaffirming and overruling a prior case. Thus, for example, we may ask whether the rule has proven to be intolerable simply in defying practical workability, whether the rule is subject to a kind of reliance that would lend a special hardship to the consequences of overruling and add inequity to the cost of repudiation, whether related principles of law have so far developed as to have left the old rule no more than a remnant of abandoned doctrine, or whether facts have so changed, or come to be seen so differently, as to have robbed the old rule of significant application or justification.

This second one is O'Connor's statement of stare decisis. This is the 'precedent bias' I meant in my last post: there is a bias in favor of established precedent. If the composition of the court changes, this will be a large conceptual hurdle that will have to be overcome if a majority intends to overturn Roe and Casey.

So, I think they would have to find problems and rewrite the issue a few different times in order to show that the holding in Roe lacks practical workability, etc.

Maybe you're right though. Maybe it is more binary than that.