I don't, and that's why I have objected to Roe for so long.
So, if I oppose the left's Roe standard due to lack of authority, and I oppose these conservative efforts to impose their preference also because of a lack of authority, isn't that evidence that I'm put "constitutional adherence" above politics? And if you think not, what would convince you? Please be specific.
If we want to get down to brass tacks,
While I'm sure you enjoyed the Court taking several pages to criticize Roe and Casey, in the end the ruling did not say "the Federal Government cannot regulate abortion" nor did it say "only the states can pass laws regarding abortion".
Roe v Wade was overturned with the argument that because abortion was "unique" because it "involved life", the Court could distinguish it from the right to privacy without undermining the latter. The Court did not say "abortion should be left to the states", but instead left it to a generalized "elected officials", leaving the door open to a nation-wide abortion ban that the Court could uphold as constitutional under their interpretation.
The part that should be alarming to anyone interested in constitutional law is where the Court decided if it finds a right or concept "unique" enough, they can carve it out of its existing protections or associates and treat it independently. The Court has, either intentionally or unintentionally, set the precedent that it can canvass a right without regards to precedent if it finds it "unique" enough.
Although the majority opinion specifically spells out that it should be seen as a challenge to any other rights protected by the right to privacy, Thomas' own dissent pokes a blatant hole in that claim; the standard that the Court has set is that it can separate rights from the legal principles that protect them if the Court decides they are unique enough. "Involves life" can just as easily be transplanted to a debate about contraception or IVF, or even adoption.
This has become the alarming standard of the Roberts Court since it began its right wing tilt; reliance on vague and unspecified standards that do not assist future Courts or justices with setting a consistent pattern of judicial interpretation. This was the same issue in West Virginia vs EPA, where the Court lambasted the EPA and Congress for not specifying the rights and powers of a federal agency...while failing to explain what they considered sufficiently specific instructions. (Ironically, in a situation where application of originalism and textualism would have actually been of use, the Court neglected to utilize either)
The Court has instead decided that when striking down provisions or laws that it does not like, it is not required to establish what standards it expects from future legislation or rulings outside of vague generalities that leave themselves open to wide array of interpretation. Conservatives like to claim that the Roberts Court has rescinded the excess of liberal rulings, but what the Roberts Court has actually done is leave the gate open to even more encompassing judicial overreach.