Don't feel guilty, I know easier said than done.
We see how bad it is in the NHS. The ward I was on, normally has 24 beds separated into 4 bays. They now have 16 due to SDing.
Yet classrooms are supposed to be safe in their 28+ packed rooms 
And it's not like staff are in ward/floor bubbles.
What is really aggravating is that EUCDC, WHO and more put plans online months ago to safely and cheaply put measure in hospitals that could have easily been used in schools. It was even mentioned in at least one of those agencies plans.
Are the kids in Alaska, Canada, Russia, Northern France, Spain etc sitting in classrooms freezing their arses off? No, that would fuck over their health systems, not protect it surely?
We know the cold kills, unless it seems you have this magical coating that is keeping schools open at all costs. If it wasn't political, why not education at all costs? We know the Conservative government abhor Unions, just look back into the miners history. And it's hard not to see some of the similarities, including media blackouts.