the gold standard test to see if someone is infected with sars-cov-2 would involve doing sequencing of a sample from the airways and potentially also stools. A PCR test is close enough, for the sake of argument.
Good luck trying to do these tests every time you want to allow someone in a building. The task is to find another requirement that is of practical value: go.
It is really quite simple. Nobody with any knowledge on the topic can in good conscience say that you can use the fact that you are vaccinated with a leaky vaccine as an indicator for not being infected. That is quite simply not how the COVID vaccines work. This is extremly dangerous misinformation. And due to the fact who spreads it, a lot more dangerous then any boogeymen of idiots drinking bleach. Focusing on those caricatures and ignoring misinformation spread by officials is utterly irresponsible and evidence for a lack of scientific integrity.
Respectfully, this is my area of expertise, and you're in the potatoes.