Explain to me why camera-only self-driving cars is a good idea again? That wreck was basically invisible except as an intermittent silhouette against traffic i

Explain to me why camera-only self-driving cars is a good idea again? That wreck was basically invisible except as an intermittent silhouette against traffic in the other direction. "Full self-driving" cars should be far safer than human-driven cars, and data from sensors with no human equivalent seems like a good way to get that in situations like this. Also, how hard is Tesla training their object-detection models for things that are only an intermittent silhouette against opposing traffic? I'm guessing not at all.