Dr. Drosten [0], maybe Germany's most well known virologist at the moment, recently commented on rules to only allow vaccinated/recovered (but not unvaccinated but tested) people into restaurants and venues [1]. The reasoning behind that is a lot different than you would expect. It is not because unvaccinated would pose a threat to others but because they are at risk of catching the disease from a vaccinated, infected but asymptomatic guest (you would only find these if everyone would be tested).
[0] He's co-discoverer of SARS-Cov1 and co-developed the first workflow for the realtime PCR test that was approved for SARS-Cov2: https://en.wikipedia.org/wiki/Christian_Drosten (en), https://de.wikipedia.org/wiki/Christian_Drosten (de)
[1] Here is a transcript of the interview that he made these comments in, in german language. I linked directly to the page that it is on: https://www.ndr.de/nachrichten/info/coronaskript324.pdf#page...