Substantive due process is far shakier. It's Justices deciding what rights they think people should have and then working backwards as best they can to justify them. The back to back gun rights & abortion rulings lays it bare. There's just no intellectually honest way of finding a right to an abortion but not a right to bear arms.
IMHO, the substantive due process was the wrong way about this. It was a shaky foundation and as more rights were found the logic got shakier. They should have used the right to peacefully assemble and based most of these substantive due process cases on them.
This is literally 99% of a Supreme Court justice's job.
Here it is in its entirety:
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Please point out the part of that amendment that references the right of people to have concealed carry for the purposes of self defense. Because it seems to me that they tried to be as obtuse and textualist as can possibly be with regards to Roe, but apparently the second amendment grants all sorts of rights that don't actually exist in the Constitution.
> Loving v. Virginia, 388 U.S. 1 (1967), was a landmark civil rights decision of the U.S. Supreme Court in which the Court ruled that laws banning interracial marriage violate the Equal Protection and Due Process Clauses of the Fourteenth Amendment to the U.S. Constitution.
https://en.wikipedia.org/wiki/Loving_v._Virginia