The fact that a right to privacy was interpreted to be in the Constitution made abortion legal for all women that is a precedent because there was no acknowledged right to privacy before the ruling on Roe v Wade.
The Heller decision brought the interpretation of the second more into line with what the people believe it to mean
So you admit that there was no SCOTUS precedent prior to Roe regarding abortion.
Surrender accepted
Abortion was illegal prior to Roe V wade now it is not
Interpretation of the constitution allowed the right to privacy
The SCOTUS interpreted the Constitution to mean an individual can own firearms.
The Miller decision revolved around a sawed off shotgun not ALL firearms