It does make you think, but the nature of current opiates from China and sold to the west makes it possible for a single rogue lab to be supplying the entire USA.

One Kg of Fentanyl is 20 MILLION strong doses (50mcg). One Kg of carfentanil is 50 million lethal doses (at the 20ug ld50 espoused by the RCMP)

So in a country of 1.5Billion people it only takes one bad actor to fuck over a significant part of the world.