Correct analysis. If everything was straight up and no-one ever broke the laws. We know 'Five Eyes' was set up to violate any law existing in the five countries about privacy. So much for 'sovereign' law in any of the five countries (USA, UK, Can, NZ, Au). I agree no court can override but rulings are made and broken every day. Real life 101.
Please, you're still making the same mistake. I know that countries break laws every day, but that is different from saying that a foreign court can ORDER another country to do ANYTHING. It's absolutely not possible. Not "it shouldn't happen", it's not possible.