Our economic dominance and WRC was by virtue of being the only viable economy on which to back a currency for the past 80 years, and continues to be so to this day.
It’s not American exceptionalism. It’s American reality. No other country possesses the American consumer. China would have to hallow out their manufacturing to shoulder the burden of WRC, something they’re not willing to do, and because of their coming demographic collapse, they lack the population to field a successful service-based economy.