My 65 year old parent, an educator in a sunbelt state, told their superintendent that if the distict came back for in person classes too early, they would walk on the spot. they'll be online-only for at least the fall.
This risk of an adult being infected by a child is almost zero.
https://www.sciencemuseumgroup.org.uk/blog/hunting-down-covi...
The flu is also deadly for 65 year olds. Will your parent refuse to work during flu season when the risk of getting infected from a child is much, much higher than with covid?