Trade is conducted by individuals and businesses, not by nation-states. The fact that two parties have agreed to a mutual value-for-value exchange makes it fair by definition, and what is unfair is encumbering some people's commerce in order to serve the interests of some particular political faction.
The proper moral position is for trade to be governed by rational rules that apply consistently regardless of who is trading with whom or what country they are from.
Nations are just as relevant as businesses as abstractions as far as trade is concerned. Free trade across the world arguably only exists because it's made possible by the rule-based order with the might of the US Navy and affiliates to secure it.
Nations are abstractions. Trade involves individuals and businesses. Whatever the US Navy is doing to secure overseas shipping lanes doesn't change the nature of that in any substantive way.
