Thanks for the statistics, that's interesting. It can also be misleading, from what I could find, less than 10% of traffic deaths occur on motorways vs. rural/city roads and motorway deaths have actually been decreasing in France steadily since 1990 (this is only from a quick Google search).
Edit: According to the OECD itf (random source I found on the internet ;)) Germany had 317 deaths on motorways vs 201 in France in 2022.