Where do you get those numbers from? In terms of total energy use, perhaps. But oil accounts for about 3% for electricity generation, compared to coal's 36% [https://www.iea.org/reports/world-energy-balances-overview/w...]. Most oil is used for transport, so dropping that would increase electricity demand, though a lot of that doesn't need to be dispatchable, and there might be efficiencies gained moving to electric. Similarly with gas and heating (gas is used for electricity generation a lot more than oil though).
Also, the same site shows nuclear as about 10% of the electricity generation mix worldwide; unless there's about 5x as much coal being used for steel-making and other non-electricity purposes, then the numbers would be around 5x instead of 20x.
Also, the same site shows nuclear as about 10% of the electricity generation mix worldwide; unless there's about 5x as much coal being used for steel-making and other non-electricity purposes, then the numbers would be around 5x instead of 20x.