Anyone who is paying will vote with their feet and will choose a safe alternative.
They'll be choosing a vaccinated alternative, if it's available. That doesn't make it safe, it means the staff are vaccinated.
Personally I don't think that the highest 'qualification' of putting someone in a care home should be a vaccination of the staff against covid.
Going to be the age old thing, this will go one way or the other, then people will forget about it and residents will go back to having substandard care, while increasing home owners profits, delivered by poorly trained, regarded and paid care workers, and no one giving a shit because they've banged their drum.
So none of the systematic issues that led to so many problems will be addressed, but all the care workers will be vaccinated or out of a job, so that'll be fine, the people being most vocal and dismissing genuine concerns about how this is going to play out aren't the ones going to pick up the pieces, again, are they?