But this specific thread is about EU social network privacy fines, not US healthcare privacy fines.
The US courts aren't quite the same. They're a lot more independent. The ECJ has a history of surprising things, like hearing cases where one of the appellants wasn't aware he was involved in a court case at all and both sides turned out to be the same law firm, or simply voiding parts of the treaties they found to be inconvenient to the EU, or inventing new 'rights' on the fly (legislating from the bench). Like the right to be forgotten, which was invented by the judges in response to a lawsuit and required massive responses similar to the creation of entirely new regulations.
The Supreme Court is generally much better about following the Constitution, not inventing new laws on the fly and ensuring the cases before them are actually legitimate.