No.
Not abstractions.
I have experience of software, I know how bad the entire industry is.
https://xkcd.com/2030/ applies to everything.
Even without malice, my degree used as case studies the failures of the Therac-25 and the digitalisation of the 1992 failure of the London Ambulance Service computerised dispatch system.
Hospitals and devices do get attacked. Bitcoin ransomware does affect hospitals. These are not abstractions, they are things that actually happen: https://en.wikipedia.org/wiki/Medical_device_hijack
I wasn't being "abstract" when I said the frequency with which attacks are attempted can be measured in Herz, that's an actual anecdote from someone I knew a decade ago.