As an sidenote, my mother was a nurse from the sixties onwards. Nurses then weren't allowed to refuse to do things like lifting fat people into bed. As a result her knees are fucked. I mean really fucked.
As I understand it, now a nurse can refuse and the correct equipment or another person who's more physically able to does it.
So in my mum's case refusing to do xyz on a fat person should have been reasonable, not discrimination.
Not the same thing, I know, but a shame nurses weren't allowed to object. It's massively impacted my mum's health. But some would surely have cried discrimination without thinking it through.