That's not the point.
Hospitals become overwhelmed with people who need an ICU bed, and a ventilator, and oxygen, and intubation, for weeks. Sure, they go on to recover, but while they're in those beds it means the health system can't provide other treatment. All those hips and knees go un-replaced; a bunch of cancer care gets cancelled; people involved in accidents go without care. Even if you ignore anyone over 80[1] you still have hospitals full of people who need intensive care.
Watch this video. It's not 80 year olds lying on the floors. This is in Spain, a country with a world-class healthcare system: https://twitter.com/shuja_2006/status/1242161754768953344?s=...
This video shows a mix of ages. https://twitter.com/WellingMichael/status/124145219842648474...
Here's Spain building a field hospital to cope with the numbers: https://twitter.com/VOANews/status/1241882351115939847?s=20
Herd immunity hasn't worked. It's been a catastrophic failure that's flooded hospitals with very ill people.