Missing from your calculus are the healthcare costs of every person in a country breathing in fumes from electricity plants that burn coal and fumes from cars that burn gasoline.
https://www.sciencedirect.com/science/article/pii/S266675922...
(And a gazillion other studies.)
Those costs can be safely deemed as 0, especially when you use Reed Elsevier.
Especially when they are offshored to China. https://www.nature.com/articles/s41561-023-01308-x
Not supporting OP because I think hes backwards on the matter. However in Canada the electricity that is being burned isn't coal based - so you need to compare the actual grid not some hypothetical grid.