For a better seperarion. You examples (laptops consoles phones) all run DC, meaning they Need to turn AC to DC, needing a PCB who does it who not design it for world use? For fridges, washing machines, dryers, they run on AC, they are cheaper to make if they just don’t have a PCB and run straight on AC.

Also note that EU kettles can run on USA network, they will just be horrible slow heaters (they are slower with about 230V/110V = ~2x)