This is a silly study. Replace AI with "Expert opinion", show the opposite result and see the headline "Study shows alarming levels of distrust in expert opinion".

People made the assumption the AI worked. The lesson here is don't deploy an AI recommendation engine that doesn't work which is a pretty banal takeaway.

In practice what will happen with life or death decision making is the vast majority of AI's won't be deployed until they're super human. Some will die because an AI made a wrong decision when a human would have made the right one, but far more will die from a person making a wrong decision when an AI would have made the right one.