You have a nagging low level feeling of unfreeness because you know in your bones that you need government permission to go anywhere. And they can deny you, purposely or through incompetence. TSA, legal ID, passports. You're entirely reliant on one government, like a newborn baby waiting on mommy for mealtime. You know this even if you don't read mobility law.

Unless you have dual citizenship. Then, you're still not really free. But you can go to either of two governments for your permission slip. And you can run away from one to the other if things get bad enough. You're are a little freer.