Earlier quoted context omitted.
How do you establish long term safety of the vaccine if you don't have a control group of randomly chosen, unvaccinated people? And if you don't, then how did it get approved?
How long are you talking? I mean, nothing stops these people from going off and getting the vaccine themselves; what are you going to do, send mailers to them to never get a covid vaccine for the rest of their lives so that we can study them?
Just because something is not possible, does not make it any less required.