China did not let US companies establish completely foreigner subsidiaries, yet the US granted it MFN status.
However, the US had protective tariffs since ever too.
Not to mention the controls on migration and remote work (which is a very significant drag on economic growth, as it prevents more efficient allocation of labor).
The global market is anarchy in the literal sense and no one is bound by a higher authority. Coercion and cartels are part of a free market.
Economic efficiency actually requires a lot of rules and regulations to achieve the free market playground we like to imagine.