No you misunderstood again, US cheese exports make up ~5% of global cheese trade between countries.
Further, when you first read “global trade” and thought “all global trade” why would you suddenly from “global trade of cheese” to “global production of cheese”.
Production and trade are the same thing. That's what we mean when we say trade.
Why would you object to the idea that the amount of global trade in cheese is equal to the global production of cheese, but not to the idea that the amount of global trade is equal to the amount of global production?
You could argue that there's more trade than there is production, because of reselling, but that would once again dramatically shrink the share of cheese trade that you could attribute to US cheese exports, which don't take future reselling into account.
