You don’t just “plug in” the type of electric heater that can heat a large space such as an entire home. It’s wildly inefficient and there are safety concerns with constantly plugged in space heaters.
And if it were true that one cannot just plug in some heaters, one would then have to integrate something better into one's home... how is that still more pain than having to exactly that for the gas to work? Not sure about the safety concerns are anything compared to burning gas, either.
I feel like because this regulation is for new construction it'll have essentially zero negative effect on anyone.