That's very much not true about heaters. The most common systems in the US are gas, heat pumps, and oil. Resistive heat is nearly always an emergency backup in places that get meaningfully cold for any amount of time.
Heat pumps are kinda what the sound like. Pumping 30 degrees of heat inside to keep warm takes more energy than pumping 20 degrees of heat outside to stay cool. Heating costs will come to dominate residential energy usage as people electrify their homes. A/C will be number two or possibly number 3 behind water heating.
All of that's kinda moot though since modern heat pumps are insanely effective, relatively cheap to install, and work down to sub-zero Fahrenheit temperatures using only air-source exchangers.