This is 100% just an artifact of a system going from human control to non-human control. Nobody bats an eye at systems which were never human controlled - or transitioned so long ago that nobody recalls human control.
I've never seen anyone hesitate when getting on a fully automated train system at an airport or an elevator. Even more-so with amusement park rides that literally put people in extreme situations.
In amusement parks you get a much smaller selection of the population than on the street or even at an airport. People who don't enjoy thrill just have no reason to visit them at all.
Aside from that, all the systems you mentioned are mechanically constrained way more than a car. Accidents happen, when these mechanical constraints physically fail, not when a computer makes a wrong choice because it failed to detect an obstacle or similar.
I've never seen anyone hesitate when getting on a fully automated train system at an airport or an elevator. Even more-so with amusement park rides that literally put people in extreme situations.