But I have.
I was left in an 'external waiting room' in the dark, with no line of sight to ensure I was still alive, prior to being admitted for vertigo. They were actively ruling out stroke and heart attack. I had no monitors, they checked on me voluntarily precisely twice in the 10 hours I sat there. They checked me twice more when I needed to go to the bathroom, and when I demanded they do something begin to address my medical needs.
Given what they were actively ruling out, and the inexcusable neglect of even basic care, I would have loved to at least have a monitor attached to AI to at least alert the doctor of my passing.
Things were better once I got to a room, but still call lights and beeping monitors were regularly ignored for extended periods of time - sometimes until I sent a spouse down to the desk to get someone.
So - as to nurses monitoring in this non-AI hospital - pulse oximiters were used a couple of times a day, leaving extended periods of time for problems (like a kink in a tube to occur). And if I had been continuously monitored, it would have been one more beeping monitor that would have been ignored because there are too few nurses on duty. (In fact, the reason I was sitting where I was for 10 hours was because the hospital had been unable to hire sufficient staff for its ER and most of the rooms were not in service.)
The problem currently isn't that nurses aren't being driven out/fired due to AI - there is a critical nursing shortage. Nurses are paid far more to serve as nurses than they are to teach - so in some places it is as hard to get into a nursing program as in to medical school. We aren't training nurses fast enough to replace those who are leaving the profession.
We need to fix that. There is no substitute for human care.
But, until it is fixed, we need to make sure people aren't dying because nurses are too busy to respond to monitors or call lights. That is one thing even relatively primitive AI is good at - applying an algorithm to alert someone that human intervention is needed sooner, rather than later.
(This is not my only recent hospital experience, although it paints the dire situation many of our hospitals are in with respect to shortages in staffing - and the need for life-saving assistance (whether human or machine). None of my recent visits have included adequate staffing.)