Voltage drop = current × resistance. Power lost to heat = current² × resistance. I think they are making a reasonable point that resistance losses are likely to

Voltage drop = current × resistance. Power lost to heat = current² × resistance. I think they are making a reasonable point that resistance losses are likely to be a much bigger problem for a CPU than for a large appliance with similar wattage. 10-20A is an enormous current even on household wires (most household circuits are rated for 15-20A), and while wires on CPUs are shorter, they're also a lot thinner. The wires in the refrigerator would likely be unable to handle 20A at 2V.