You are right! Computer use should be taught, tested and licensed exactly the same way of steering several tons of metal at 70mph are!

> "One [software fault] was when the operator incorrectly selected X-ray mode then in 8 seconds quickly changing to electron mode, which allowed the electron beam to be set for X-ray mode without the X-ray target being in place"

Therac-25 is an important software-development case study but a torturous stretch of "Using a computer wrong"