The balance is that Tesla will learn from this accident. They will change the software on the existing vehicles to try to detect this situation better, and they will undoubtedly outfit the next generation of cars with improved sensors to avoid this specific accident.
In contrast, in a human-driven car, the only one who learned anything is dead, so the next person who gets in the same situation will likely react the same way and end up just as dead. At best, there might be a slight change to driver education because of it, but it isn't worth adding e.g. an extra lesson to the curriculum to avoid one specific accident.