110V In US Homes
Aside from perhaps ranges,hot water heaters,heaters (air, boilers, furnaces, dryers and perhaps air conditioners, most USA homes do not have appliances that require 220v power.
Electric power was first used in US homes for lighting, then clever persons (including power companies and or their builders) wanted to increase demand and started designing and building all and sundry sort of consumer appliances to run on electric power. When it came to laundry, most homes got their hot water from a central boiler/heater.
Since the United States has abundant natural resources of coal, petrol, and natural gas, these were what was used for heating and hot water, then when the switch was made to electric, fuels were used in power plants to generate electric power. Far better to have one large power plant supply electric power for running boilers and heating in area homes, than all those homes burning coal themselves.
Where one lived also played a role, as there were "all electric homes" in areas where power was quite cheap. However coal and oil normally were cheaper still, so unless things were being given away....