Of course they should stay home if they are sick. (Not that everyone does, unfortunately.) The idea though is that there is a short time before one is aware he is sick where he can infect others. But I doubt I’ll change your mind. This has become a politicized issue.
People are going to get infected, but that doesn’t mean they are going to die. You want to wear a mask do it, but the issue is MANDATED masks-get it?