I do a cleaning job once a week for a neighbour who's been in hospital, she's coming up 67. She's been telling me that the nurses and hospitality staff all call patients darling incessantly. They all do it and she thought it's part of their training. I'd hope not! Another thing they keep saying is bless/aw bless.
AIBU to say this is not professional? I'm not in my sixties but I'd stop it immediately if anyone said it to me.