No, I think you have it: correct in thought. This is why these treaties are so serious.
Imagine if we were to shut off CAP or California. Massive populations have made arrangements based on expected flows. “Too bad for them” maybe, but the FedGov is definitely going to step in to protect the masses.
You can argue right or wrong, but in my mind, it is kind of like the Colorado liquor license thing in the sense that unwinding a bad law is going to hurt an awful lot of little guys.

