I think it’s stupid Japanese keep the windows open when it’s freezing out

Maybe this is a hot take but I think it is so stupid that they keep the windows wide open when it is freezing out. I don't care if it is to help prevent germs. It's backwards.

I always hear teachers go. I'm cold. It's really cold. Yeah I know. Well maybe if you didn't have the windows wide open and put the heat on. DUuuuuRrr HuRrrr I am so angry. I have a kairo on and my jacket.