Maybe totally fine for you. But that will not be "totally fine" for much of the US when they are expecting to keep their house at 72 degrees and the new technology they got talked into can't do it.

The tech has limits and cold weather states can't avoid that or the reputation will get really bad and the tech will fail.

I'm not sure if you've lived in prolonged -15F areas, but many conventional heating systems struggle too... especially in poorly insulated houses. People often have wood stoves or other ways to compensate.