It’s just not true at all, lol. Even by this way more useful metric France is doing quite well, substantially better than Germany for example. People are using this metric because it’s just useful while electricity footprint is only useful when you’re talking about very specific scenarios (like, how long until a BEV emits less carbon than an ICE).
About 50% of the primary energy consumption in France is low emissions.
The current discussion around energy sources is basically always centered on electricity, which is only part of the picture. Given that in most industrialized countries industry as well as heating accounts for a substantial share of primary energy use, its dishonest to not take those sectors into account.
Having 100% nuclear clean energy doesn't help you at all when electricity only accounts for 20% of your primary energy usage. That is not intellectually bankrupt, that is just common sense.
If electrification of heating as well as mobility continues to increase, looking at renewable energy as a share of primary energy consumption will paint a way clearer picture than any other stat.
There's nothing pro- or anti-nuclear in this argument, since primary energy consumption can be electrified with or without nuclear.