I mean, we're all free to buy as many guns as we want and in some places we are free to carry them with us. But one of the things gun carriers accept is that they won't be able to get into a stadium full of people while they are carrying a gun.
Same thing with the vaccine. I'm free to choose not to get it but I understand that my unvaccinated body won't be allowed into a stadium full of people.
I think that's completely reasonable.