> people under 50 mingling with each other are deadly threats to people over 50

This is why those at risk of death should self-isolate.

>the chance of suffering serious damage to lungs and other internal organs that takes months to recover is a bit higher

Do you know where I can find the statistics for the risk of permanent lung scarring by age, or something approximating this? This is something I hadn't considered but would like to explore more.

>The chance of dying for everyone goes up several times if the medical system gets DDoSed by COVID patients

It's almost entirely getting DDoSed by old people.

>employers can no longer fire people who wanted to protect themselves

Employers are firing everyone. We're hitting some of the highest unemployment levels in American history. This is a moot point.