If your house was in fire then you could not host. But you can, just don't want if guest is not vaccinated. Its completely. different.
Btw vaccinated people can get infected and can spread the virus too. The vaccine only protects them to end up in hospital, it doesn't really protect anyone else. If you are concerned for your community you should stop hosting all together .
There was a three days festival in croatia, few thousands people came from Austria, all of them had to have covid passport. At the end 200 of them got the infection there.