Well, obviously the maker of said hardware doesn't know what safety critical hardware means, but that doesn't mean it doesn't exist.

I've seen both IV pumps, ventilators, and MRI machines BSOD.

> Which almost always happens because someone messed up their C or machine code,

Or hardware failure, possibly injecting faults into the system. See Page 14: https://www.hq.nasa.gov/alsj/ApolloLMRadarTND6849.pdf