Well, judges have limited power, too, and it comes largely from the text in front of them (not entirely, but largely).
SCOTUS is not the only mechanism for preserving rights. We also have state constitutions, elected representatives, etc., and it seems like those are also (mostly) doing their part to protect bodily autonomy.
With a strong enough mandate, there could also be federal laws.
But we are in a country where not everyone agrees and the text is ambiguous, so I don't really know what you expect to happen that would be in line with democratic principles.
Anything that's not clear in the Constitution is fair game, then?