From my understanding, the ruling did not change the rights of or existence of Trans people, regarding their equality compared to others.
With most laws, language is very important, and as time advances, labels that were attached have to be clarified and or modified.
Example, Pluto a planet or not, or when new variations of species are confirmed.
The ruling still recognizes Trans’ rights, and clarified the “label” of woman due to conflicts that arise in certain legal contexts because of it’s original “meaning”.
As folks who are familiar with the language in the courts and legal system, laws and languages are continuously being revised based on context and new information to adapt to changes in our various societies.