That just means that humans cannot be trusted to notice or respond quickly to an emergency situation. The situations parent listed do not require immediate intervention. When the system detects an anomalous situation it can raise an alarm and shutdown while it waits for a grumpy human to show up and resolve the situation.
and importantly if it were a remote human who was alerted and put in control they'd be waiting to do it as their job and not the sleeping/drunk/texting driver in the vehicle
