You’re misinterpreting what I said and conflating two separate scenarios in your 2nd statement. I didn’t say anything about the system warning “for a few seconds before shutting down” in the event of an eminent collision. It warns the driver before shutting down if the driver fails to hold the steering wheel during normal driving conditions.

The warnings were worthless because the driver kept responding to them just before they timed out and shut autopilot down. It would be even worse if the car immediately pulled off the road and stopped in traffic without warning the driver first.

They aren’t subtle either, after failing to touch the wheel for about 5-10 seconds it starts beeping loudly and flashing an icon on the screen.

This is not a case of autopilot causing an accident, this is a case of an impaired driver operating a vehicle when they should not have been. If the driver was using standard cruise control, would we be blaming the vehicle because their foot wasn’t touching the accelerator when the accident happened? No, we wouldn’t.