“The purpose of these ships is actually to haul Walmart-type merchandise from South-East China to California.”
Maersk bought the port of Lazaro Cardenas in Mexico to build a “Superport” for these ships, and their own super-ships, a few years ago.
The port connects directly to the Kansas City Southern Railway, right into the Central U.S.
The Punta Colonet Superport has been on hold, because the US Enviros (with Union support, imagine that), are fighting rebuilding the rail connection through the California desert.
I am not too far off actually.