If you had non polluting shipping and the costs were still cheap enough there would be nothing intrinsically wrong with this. The problem is the market externa

If you had non polluting shipping and the costs were still cheap enough there would be nothing intrinsically wrong with this. The problem is the market externalities of the pollution of our current shipping methods, and likely the imbalances in the labor markets and regulation. If you fixed those, then it would probably no longer make sense to do that, but you can't fix those systemic problems by banning the symptoms of them.