Your pedantry only works in a closed loop where all externalities are accounted for.

There is no real world scenario in a place that has a beating season where the cost to the consumer is better with electricity versus gas or oil. Electric costs about 4x for whole house heating in my neck of the woods, and houses quote electric only heat sell at a discount.

My guess is that your evaluation of electric externalities doesn’t include the health impacts of burning coal, ecosystem damage due to hydroelectric or long term storage and other capital costs incurred by nuclear generation.