All vehicles being level 5 only will mean 0 deaths from drunk drivers, 0 deaths from drivers on drugs, 0 death from bad drivers, and basicly reducing the number of yearly deaths from vehicle accidents to less than 1% of what they are now.
Considering that now that figure is around 30,000 deaths in the US alone each year, that is the saving of MANY lives.
The reduction in healthcare costs for vehicle related deaths and injuries is huge. This is something that everyone should agree on.