Till they know for sure if the vaccine cuts transmission it’s still silly, they could pick it up and take it back to the care home / pass it on.
I wouldn't categorise it as silly myself, as that is being a bit too flippant about a really, really serious situation imo.
Wise? Perhaps not. But understandable, is all I'm saying.
The vaccinated need to be given some surety and soon, otherwise this is only going to become a bigger issue in the coming weeks. People who were vaccinated quite a long time ago now, feeling they're no closer to seeing loved ones, aware of their own mortality. It's an absolutely horrible situation and I feel simply branding these people "silly" is far too simplistic a way of looking at the situation.