Again just an argument in semantics.
The problem with aged care is the casualised part of their workforce. The cleaners, cooks, casual carers, etc. These are the ones that travel between sites and move around the entire facility, and are most likely the lowest paid and lowest education level, coming from backgrounds with other casual working family members that congregate in numbers. The professional workforce, ie nurses, doctors, specialists, accountants, marketing, liaisons and management are most likely full or part time and are not the issue. Again even if its just 25% of your workforce is casual and travelling between multiple sites, that's still too much. The facility is only as secure as its weakest link.
I don't know why I needed 4 posts to explain that a Aged care facility is not just a bunch of nurses, I thought that would be obvious.