That's a great point. Next up, we'll make sure Muslims can't go to the same conference because they chose not to go.
Maybe your next thought is the vaccine makes the conference safer. Let's play Choose your own Adventure. You have to sit next to someone on a crowded airplane in economy class for 3 hours and this person loves to talk. You get to choose that this person is either a) vaccinated, or b) tested negative for covid every day for the past 3 days. Which do you choose?
It's fascinating and scary that fear has led our society to let segregation creep in under the guise of public health.