I believe that teachers who feel worried or concerned about coming back to work absolutely should stay home. And only those who feel comfortable with teaching in person should go back to work.
That’s it. Problem solved.
What will they do for income? Well, the same thing that they currently expect parents to do if schools don’t reopen. I don’t know what that thing is because they aren’t communicating it to the public. But whatever it is, they should be absolutely free to do it. It must be something really great judging on how carelessly and eagerly they inflict this wonderful option on the public.