I don't think there would be a degradation of care, 0.5% leaving (if it got to that) isn't as bad as more covid, or putting people at needless increased risk, which I expect is how the risks were calculated. Never mind the risk to the actual staff being off with covid, which is a big problem that was largely solved by vaccines.
I'd rather nobody left, but more important than that, is less people dying. I would expect that those in that profession would have some sort of grasp over risk reduction, but some just don't get it, just like in any profession. It's just like people can make poor decisions in their jobs, be bad at some jobs, or do more harm than good (not saying that's the case here, but spreading covid to 10 people on a ward, is not a good outcome).
Hypothetically, if an Anti-Vaxer wanted to treat my grandparents (for something non life threatening) I'd ask for someone else to be honest, I'd rather even pay private, same as I wouldn't want them in a care home with a load of anti-vaxers. End of the day they're being paid to help the public and should be doing all that is reasonable to do that, and the vaccines are more than reasonable, they protect the actual nurse for a start.
People like me? I know 10 nurses that all agree with me, most of them worked on a Covid ward or in A&E etc? You're disagreeing with them, to favour someone who does not understand risk reduction.
Who is on about life saving intervention? I'm on about the 100 old people in there with relatively mild problems (not dying), and I'm not for measures which can put them at increased risk, so some of them could need life saving intervention, when they otherwise didn't need it.
Shame on me who agrees with the vast majority of nurses who chose the vaccines? You're the one agreeing with a tiny percentage who don't, in a role which needs it most.