You’ve conveniently ignored the fact that the average driver in 2023 (without any help from a driver assistance system) is severely distracted. Surpassing the level of attention and responsiveness of an average driver is a very low bar right now.

Also, your focus on the time given to take over before a collision makes little sense. If the vehicle senses a dangerous situation, it doesn’t just throw up its hands and disengage - it’s going to attempt to stop or maneuver out of the way of danger the same way a human would, and people don’t demonstrate a lot of skill or success in those situations either.