Essentially the right for a government to be independant of the rest of the world. The right of a government to represent/control it's people. North Koreas right to enslave its people.
a less contentious/obvious example would be legality of drugs. some places outlaw alcohol & others allow it. One ‘rule book’ forces everyone to the same set of rules.
Oh I get that it would likely expand its powers over time. By then we would likely be facing such global issues that people would want that, just like the US government.
people want expanded state power for their pet issues. it always gets out of control & ends up punishing castes of people for petty minor things (eg personal use of drugs like weed
Or requiring thousands of hours of experience & thousands of dollars for a license to braid hair. Or allowing MPAA & RIAA & patent trolls to run wild. Punishing whistleblowers.