The author feels dual citizenship gave her options. Another option is to be a permanent expat without seeking local citizenship. An upside to that is that you may still be able to leave the country if it goes to war and locks in its own citizens (like what happened to Ukrainian men when Ukraine was invaded). And if your country of citizenship tries to lock down its citizens, you're already not there and you would probably have to commit a serious crime to be extradited.
Most people can only enter foreign countries if they get a time-limited visa. And sometimes you cannot get another visa without being out of the country for a longer time.
