Further to the points about herd immunity, willfully unvaccinated people put everyone at risk including people who have been vaccinated.
I had no immunity to Rubella despite being vaccinated against it eight times. The measles and mumps part of the vaccine took but for some reason my body ignores the Rubella component and I have no antibodies for it. This has been picked up during pregnancy blood tests and then during routine blood tests since.
Herd immunity stops me from catching Rubella but once it starts circulating in the general population in at risk. I'm not having any more babies so the risks of contracting Rubella are all to myself. These risks include brain inflammation, bleeding problems, and arthritis. I already have a condition that increases my risk of arthritic changes to my joints so want to avoid anything that increased that further.
If you don't want to vaccinate then that's fine but you shouldn't be able to access public services in order to protect the general population from your stupidity.