Technically parents can choose to put 2 masks and a face shield on a child and avoid packed public spaces. Though thus far the odds of a child getting sick and dying have been astronomically low if I understand them correctly. Possibly comparable to being struck by lightning. In some sense people have to bare responsibility and protect themselves and their families. I know for certain if I had an underlying condition and couldn’t vaccinate, I would not expect the whole world to stop and wear masks on account of me. I would mask up, put on a shield, curbside pick-up and so on. Too many people want to vilify all the unvaccinated and unmasked as if they are rolling the dice with other people’s lives. You roll your own dice when you choose to go outside without a mask and face shield. Limit your interactions, double mask and shield, you should be fine.
Of course, public schools complicate the issue.