Yes, the states are kindof like independent nations ... except for the fact that they formed a union based on a Constitution that binds them all, and that Constitution protects the Right to Life (among other things), that right being the first inalienable right granted by God and not by the Constitution itself.
Alito's claim that there's no mention of abortion (one way or the other) in the Constitution is incredibly dangerous, in that it implies that abortion doesn't fall under the category of Right to Life, and that therefore an unborn child is not Life under the Constitution. This opens the door to various states legislating what "life" is, to the point that the next steps are to claim that people who are in "vegetative state" are not "life" (like Terri Schiavo) or that people who are mentally retarded to the point of not being functional are not "life". If the states are left to determine what life means, then the Satanic blue states are just a hair's breadth away from euthanasia and eugenic murder.
So, between the fact that Alito claims there's not inherent protection for unborn children in the Constitution (false) and the fact that he asserts that the federal union has no role in regulating abortion (thus precluding federal laws being able to trump state laws permitting abortion), this is an incredibly harmful ruling that does more damage long term to Pro Life than if it hadn't been made and if the current progress of states gradually making abortion (effectively) illegal had been allowed to continue as is.
This is to say nothing of the fact that in the practical order this is going to energize the Satanic Left to the point that they'll expand abortion in the Blue States, and the moderate states that may have been "thinking about" passing anti-abortion legislation are gong to be cowed and intimidated by the Left. If any "on the fence" politician is thinking about voting for it, they'll be attacked politically, economically, and perhaps even physically ... so that they'll be much less inclined to come off the fence on the right side.
This is very clear to me, and I don't understand why others don't see it ... except due to the emotional baggage attached to "Roe" over the years that's causing an emotional celebration. Please engage intellect before allowing yourself to be carried away with emotion.