You do not seem to understand. Customer has an implicit meaning of having your services sold by a company. Citizens do not have services sold to them. They're bound by a social contract, and have agreed to go ahead, together. The services they benefiot from are the consequences of their choices. The nation and the state are an extension of this social contract. I do not care for borders and walls, and would gladly see them disappear. But not if it's at the cost of becoming a "customer".
Customers can opt out of the "contract". If citizens can't, some of them will have very bad experiences. That's true even if most citizens are able to affect the terms of the contract in meaningful ways. Some citizens simply do not have that privilege, and occasionally their happiness is contingent on the possibility of escape.
