It used to be said that, "first comes the election, then the decisions". The court was expected, liked or not, to follow the political wind. It has never been a perfect system.
When I write that the Justice needs to follow the law as understood, I am calling into question this concept: DID the Roe Justices really understand the law to mean what they found it did? To be honest, I do not think that. Even Justice RBG didn't. I think that they had an agenda. They wanted a political outcome that did not reflect what they really thought the law meant. And the US has been torn apart by that ever since.
I think you might be questioning what is ultimately a technicality. I don't think there's any practical difference between making a judicial decision the judge doesn't truly believe in to meet a political outcome, and being led to believe in a certain interpretation of law because of a desire for certain political outcomes.
You write that, "judges can find justifications to make pretty much any old shit up". I think it was Scalia that wrote if the plain meaning of the written law can be reasonably understood, one should not look to other writings (even the Federalist Papers) as it would be like entering a room full of people looking for a familiar face.
It's interesting you cite Scalia, because Scalia was known to strongly advance constitutional originalism. Yet when one looks through, there's plenty of evidence he was not necessarily very consistent about it - or at minimum, that his interpretations are far from certain.
For instance, the First Amendment states "Congress make no law respecting an establishment of religion or prohibiting its free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances." I fail to see how any Constitutional originalist would therefore argue that
individual states cannot do these things. But that's a lot of established decisions to overturn, and I cannot help but feel it's really not going to make the USA a more attractive place.
My hopes if Roe is over-turned:
1) People stop looking to the courts to create laws they want rather than persuade the electorate of why their views should be law;
2) Court appointments become a mundane matter again that few even notice;
3) The Courts really do enforce minority rights over majorities when that is what a reasonable person would interpret the law to really mean;
4) As to reproductive rights, we really start debating them rather than have an elite body instruct us as to what they are.
1) This will not and cannot happen. The judiciary is a branch of government: it will now and forever make judgements that determine the interpretation of law with potentially high impact on people.
2) This will not happen. Because courts exercise huge power, those with the ambition and desire for results will always seek compliant judges. The best (and even then, imperfect) way to resolve this is to remove court appointments from political decision - be that democratic vote or appointment by democratic representatives.
3) Okay... although "reasonable person" starts being very tricky, and goes into the core issue of some jurisprudence. Originalism, after all, effectively defines a "reasonable person" to be a "reasonable person of 1776", not a reasonable person of 2022.
4) A parliament of elected representatives is an elite body: is this not precisely the basis of many Americans' dissatisfaction with their government, that it does not adequately represent their people?