Sure. That's still a big number though. And with that much nuclear, even resistive heating is pretty reasonable from a carbon perspective.

Nuclear power is a giant kettle, why would you even bother with resistive heating?

Cogeneration would be much better for sure. In most countries heating with natural gas ends up being less carbon (after losses). But in France even resistive heating could be viable from a carbon perspective.

To be clear you should never do this, you should use a heat pump. But you could and it wouldn't be the end of the world.