Don’t treat everyone the same!
Lock down and isolate the elderly. Let everyone else interact and build up herd immunity. Children and young adults were at no risk from COVID. They should have been allowed to live their lives.
That didn't work. My SIL's elderly aunt died during the early weeks of Covid. The only treatment at the time was to stick that person in a ventilator when they turned blue. The aunt declined. The family did manage last goodbyes via a cell phone call.