Why is US laws applicable to Google ???. What if Google simply relocates it's incorporation domicile to Lichtenstein or sometime to Mars instead ???. I am baff

Why is US laws applicable to Google ???. What if Google simply relocates it's incorporation domicile to Lichtenstein or sometime to Mars instead ???. I am baffled as I can access and use Aliexpress based in China and they don't have any paperwork filed in my country to operate there.