As pointed out by several other comments, you're very off base about heat pump efficiency and about natural gas being "clean." Switching everyone to heat pumps

As pointed out by several other comments, you're very off base about heat pump efficiency and about natural gas being "clean." Switching everyone to heat pumps would lower emissions from heating and cooling in the US by 160m tonnes a year [1], which is something like 30-40%. It's true that upfront costs of heat pumps can be higher, but thanks to the IRA there are huge subsidies available (and further subsidies in many states) which make up most or even all of that difference. The lifetime costs of heat pumps with these subsidies should be substantially lower than high efficiency natural gas furnaces. [1] https://www.rewiringamerica.org/circuit-breakers-heat-pumps https://www.rewiringamerica.org/circuit-breakers-heat-pumps (Those subsidies, by the way, are one of the reasons "everybody is talking about heat pumps")