If the weight of the car stopped her from breathing she’d be dead.
The facts of the matter are:
The car is programmed to stop and turn on its hazard lights when it detects an obstruction underneath it.
That is good policy, overall, for when a person is trapped under a vehicle
As exemplified by this situation, where moving off her leg could endanger her life
A larger narrative was attempted to be extrapolated from the smaller narrative here of a car endangering someone’s life.
However as has been described already, this car did not endanger anyone’s life any more than a human-driven car would have. In fact, given then scenario of a pedestrian literally flying into its path, it behaved optimally for that scenario. Something a human driver may not have done.