It's is absolutely a right for people to decide if they and their children are or aren't going to get vaccinated. The question is if kids who are unvaccinated should get access to public schools, and IMO they should. Unless there is a documented outbreak. Then, the state should have the ability to force those kids to stay home.
I don't see any reason to restrict public access to anything when there isn't a outbreak. Hell, unvaccinated kids have been attending public schools for decades without any major issue.
The state should largely stay out of this altogether. In reality, I think this entire issue is going to sway the public and there is no doubt in my mind that the number of unvaccinated children is going to be reduced dramatically now.
And that's how freedom is supposed to work. People make their own choices. When it turns out they made a bad choice, many of them will correct it on their own.
You're suffering from shifting baseline syndrome. Because you don't remember things being any different, then you assume that there has never been an issue. There aren't outbreaks because people are vaccinated.