Why not wait for an authoritative report before jumping to conclusions?
One of the contributing factors is the French roads.
Even now when you see a new report, there are no guard rails in that tunnel. Cars pass those pillars just a couple of feet away. That accident is just waiting to happen again when a car collides with a pillar.
When you drive on the interstate you will note that every overpass has guard rails to guide a car away from colliding with a pillar. That is not to protect the pillar. It is to prevent a car from colliding head on to a pillar that will stop the car in milliseconds. It is the sudden stop that kills.