People who just take that joke as serious clearly haven’t thought through the consequences of using code you don’t completely understand and has no real author. Therac 25 is often a key topic in any rigorous computer science education.
If I remember right, during the height of the most recent Iraq war, a U.S. soldier had a higher probability of being killed in a traffic accident while in the United States than being killed while actively deployed in Iraq.
If a (so-called) self-driving car screws up and kills some people, it's headline news everywhere. If Joe Blow downs five shots of scotch after being chewed out by his boss and crashes into a carload of kids, it barely makes the local news.
Sounds like he didn't know nearly as much as he thought. Chairlifts are remarkably safe.
https://newtoski.com/are-chairlifts-safe/
I get the point you're making though.