Further the cars need to safely stop in an emergency without human intervention. There’s no way for the car to first notice a problem, then send a message to a call center which then routes to a human, and for that human to understand the situation, all fast enough to avoid a collision. Even 50ms is significant here let alone several seconds.
I'm just saying that "it avoids a collision" by not ramming into people or cars is table stakes and it makes us look incompetent if we tout it as a flagship feature.
Not failing due to a software or hardware issue is way more complicated than just usually working.
Avoids a collision is similarly way more difficult than just detecting a stopped car. What needs to happen when a car blows out a tire at speed isn’t just slam on the breaks for example. At scale cars need to adapt to the conditions and drive defensively not just watch what’s directly in front of them.