This is just plain false. In the 1990s and early 2000s, EDF was generating a whole lot of profit, which it wanted to reinvest. The governments of the time (both left and right) said: "Nope! We’ll take that, thank you." As a result EDF stopped making new nuclear plants and, most importantly, new nuclear engineers and technicians. When the government suddenly decided to have EDF build a new plant 15 years later, the 1980s generation was all but gone, the industrial know-how had vanished, and thi construction costs very logically skyrocketed. Oh, and in the meantime EDF had been (and still is) forced to sell electricity to its competitors under production cost.
You won't find any grid which isn't subsidized, remember Germany already spent ~2x the French grid and that didn't spend by itself.
So is everything else.