It's the teachers I feel the worst for. My eldest is only 5. I think the chances of her getting seriously ill with covid are quite small, but her teachers and teaching assistants might not be so lucky.
I do see why primary age children have to be in school, from an economic perspective, as their parents may not be able to work if they can't sense their dcs to school. Not saying the economy should be prioritised over health, but at least I can understand why they are doing that. I don't get why secondary age children, age 15 and up especially, have to be in school. Most children that age can be left at home and most will be able to work a laptop better than their parents, so could work from home.
But maybe a secondary teacher will be along to tell me that they are better off in school. I know one secondary teacher who was livid about the first lockdown as she wanted to see her pupils and felt it was a very big deal that she couldn't teach them in person. So I may be talking absolute nonsense.