"Always a good idea" for whom? If country A has plentiful production but country B hasn't, the companies of country A are better off exporting to country B, bu

"Always a good idea" for whom? If country A has plentiful production but country B hasn't, the companies of country A are better off exporting to country B, but this will make prices go up in country A. Definitely not a good thing for the average citizen of country A, which would be better off with a disconnected grid.