I really don't understand why we're watching the world economy go into freefall for social distancing when we could just quarantine those vulnerable to the disease. This only ends when every single person is immune to the disease, so wouldn't it make sense to quarantine those who could die from the disease and then let it run its course? It's incredibly frustrating.
Know what's even more frustrating, though? That's still an option.
If you let the virus spread unchecked through the under 60 population the economy would grind to a halt anyway because so many people would be sick at once, and the healthcare system would be totally overwhelmed.
Younger people may not be at high risk for serious complications or death, but many of them would still be sick enough not to work.
Plus the fact, we still don't know nearly enough about what the virus actually does, what long term damage it might cause to the lungs, etc. Much better to gain more knowledge before letting the whole population get it.