A stunt gone wrong is when you take precautions, hire professionals who know what they are signing up for and then mistakes or accidents happen. Stunts are dangerous but precautions can be taken.
That is not what happened in this case.
What is described here is an an actress, not a stunt professional, being told told that a sloppily modified 50 year old car is likely unsafe. She refused to do it, was pressured into it by her director and friend, lied to about the nature of the road. She was not given any kind of safety gear, harness etc.
It led to an easily predictable and openly predicted accident that left the actress , reportedly, with permanent injuries. Then the director refused to allow the actress to see the footage without releasing him from his responsibility.
Sure this doesn't involve sexual assualt but since when is that the only way someone can be an awful person?
This is awful behavior that is not separable from his work. This is awful behavior AT work.
What this involves is straight up a man being criminally negligent and abusive as a person and as a director. This is a director failing to do his job. This is the same kind of behavior that led to death of Sarah Jones on the set of Midnight Rider after no one bothered to coordinate with the local railroad when they were filming on the tracks.