I know, my post was factual and complete about what the SC decided, you tend to leave the "the removal was illegal and Garcia should get due process part in the US" part out.
The supreme court's decision also didn't overturn the sky being blue or water being wet.
Neither side in the case contested that the removal was a mistake and unlawful. Courts only rule on actual controversies, this is one of the most basic premises of jurisprudence, which is enshrined right in Article III of the constitution that grants
their domain of powers, right after the one giving the president his diplomatic powers.
At issue was the actual order of the lower court