Powered doors are one dimensional machines with perhaps one binary sensor and a motor driver, a person could implement a state of the set automatic door in an afternoon.
You would also have to be rather clever in order to get an automatic door to injure you.
A car is also a rather easily understood dynamic system, but that isn’t an issue either. We are all quite frequently in the position of being at between a few seconds and one heartbeat away from a car killing us... walking down a sidewalk, crossing the street, driving on the highway...
We understand pretty well the dynamics of a human driver. Even the drivers that make terrible mistakes we understand something of hope and why.
A robot driver though... the terrible mistakes it makes are mysterious and terrifying. They make the kinds of mistakes a human never would (and few mistakes a human would make).
