Everyone’s at fault here. She had no business stopping on the road for a non-emergency - without her flashers, yet.
However, cars stop for all kinds of reasons on roads. They break down. There are accidents. Sometimes there’s a deer in the road, debris. I know someone who totaled a car by hitting a flat rock the size of a grapefruit. You can’t just blithely drive into oblivion.
It’s getting to the point where every accident is a crime. On the other hand, it’s getting to the point where animals are valued over humans.
Both sides are evil.