I think the "sacrificial lambs" have been waiting in line since March. Namely, the nurses, doctors, plumbers, electricians, HVAC technicians, auto mechanics, and everyone else deemed "essential" to keep this country somewhat rolling when the pandemic hit.
And from what I've seen, they haven't been dying off in massive waves. So unless the educators seriously go backwards in the parameters laid out to keep themselves safe, I think they'll be ok
I don't disagree that many "essential" workers have certainly played the role they signed up to. Teacher are ready to do the same. However if you're a 60 year old teacher with a lot of health issues, I think they should be have an option to leave or teach the virtual options.