Um, that was the point.
They are still all those things.
The person who didn't want the vaccine because it's experimental isn't going to suddenly be convinced that it's not experimental.
The person who is anti vax isn't going to suddenly decided vaccines are the answer.
The person who listens to all the right wing talk saying not to get vaccinated and that COVID isn't a big deal, even as many of those very people catch and die of COVID isn't going to suddenly decide that COVID is dangerous or even if dangerous that the vaccine is the answer.
We're past the point of trying to change those minds. It's simply not possible anymore, they've been in whatever reason for to long now. The only way to change the mind of someone who has bought into all the right wing talking points, believed the points about not taking the vaccine, wasn't convinced as the talking head that told them all the information died is to overturn the last year in their head. To have them change perspective and acknowledge that they were wrong for the last year. It's not going to happen. The mental hurdle is to large.
Hence, we need new reasons that aren't tied to those. Even if they only give an appearance of not being related. Just needs to be enough so someone can have both thoughts in their head at the same time and does NOT need to admit they were wrong. They can be BOTH right in whatever prior idea AND get vaccinated at the same time.
That's why restrictions tied to vaccination are the only answer left. The only thought that needs to be overcome is that the vaccine isn't going to kill someone. If they cannot get past that, there's no hope. Since who would do something they think will kill them. All the other stuff, they can simply be angry that they're being "forced" to take the vaccine. Want to go out to dinner, get vaccinated. Want to go to a movie theater, get vaccinated. Want to get on a plane, get vaccinated. Want to travel internationally, get vaccinated. Someone can justify that they want to do do those things and since those things required vaccination, they're getting the vaccine. It's not because the prior thought was wrong. The vaccine can still be "stupid, not required, COVID not a big deal" but they'll get it anyway because they want to do X and doing it means they need a vaccine.
For the real anti government everything types, getting a drivers license or any ID is probably stupid too. But they do it anyway, because the hassle of not having one is to large. That's the only answer left.