My parents are 80, currently in good health, but definitely at high risk if they caught COVID. They're well-off and like to go out and spend money. Any kind of "focused protection" strategy means they have to stop going out and their spending will plummet. They're not alone; I believe "healthy affluent Baby Boomers" is actually a pretty large group of people in Western countries.

Fortunately we live in New Zealand so they can (and do) continue to go out and spend money without fear.