Sin City can indeed exist.
But it shouldn't exist here. It's just three thousand kilometers away, still within missile range, and the Federation even has a Tier Ten Legendary. Whether the legislators act or just one of the two Legendaries comes over, it could make a difference.
Even the current intercontinental missiles.
If one wanted to, Sin City couldn't withstand it.
And Baiyi doesn't believe that with so many people in Sin City, there's no one who hasn't gone to the Federation to gather intelligence. They even have a law enforcement team, so they surely have intelligence organizations too.
In such a situation, they still calmly build a city here. How could strong individuals be willing to let others control their fate?
So, after eliminating all impossibilities, only one possibility remains: they cannot leave, or something prevents them from leaving.
