In his 2022 majority opinion for Dobbs v. Jackson Women's Health, Justice Samuel Alito took great pains to argue that allowing states to ban abortion was no slippery slope to gutting other human rights. Claiming abortion is a "unique act" because of the "potential life," thus making it different from other court-established rights like birth control or same-sex marriage, Alito argued that Dobbs "does not undermine" other rights "in any way."
Roughly no one believed him at the time, in part because Republican protestations that they are "pro-life" are a thin pretext for what is an authoritarian obsession with controlling people's sex lives. It also didn't help that Justice Clarence Thomas used his concurrence in Dobbs to call for Republican lawmakers to go after other rights. He argued that "in future cases, we should reconsider all of this Court’s" previous decisions legalizing contraception and homosexual sex, as welll as the decision to permit same-sex marriage.
