I believe that not allowing producers to avoid the constraints of the internal US market thereby frorcing them to spend whatever they spend to curry favor and pay extortion to political thugs on fighting against there being no free market withiin the US until such a free market actually exists is in the long term best interests of and in the long run produces the loweest possible prices for American citizens.
It also just happens to be in the best interests of the producers themselves who, as of now, are just feeding the alligator in hopes they'll be the last one the alligator eats.
Anything else is back to that "all things being eual" canard you stick to.