That’s a great illustration of the danger of a “heroes” popular discourse. You don’t need to feel guilty about putting a hero in harm’s way because that’s what a hero does. So actually you can feel good and righteous for helping the hero actualise themself. Turn a class of people into heroes and you don’t need to pay them, protect them, worry about their emotional needs or do any of the other pesky things that get in the way of their destiny of sacrifice.
It’s utter bullshit. We’ve seen it play out with soldiers, with medical staff, with care staff and now it’s the teachers’ turn. If you don’t like it, you need to resist the rhetoric at every stage. Don’t fall into any of the traps, including the Poppy Day idealisation of the soldier identity, the clapping for the NHS, the use of words like “angels” and “heroes” etc etc. Use the opportunity instead to express anger that the very reason these things are seen as necessary is because we haven’t fulfilled our social duty of care to those we are creating heroes of.