Perhaps let's first explore the question whether they were right. Epidemiology 101 seems to say they absolutely were. The less people interact in close quarters, the less a sickness spread.
I have a feeling we're forgetting here that there's an actual virus on the loose. The pandemic isn't a media construct, it's not a mass hysteria. So I think we should also entertain the option that a virus spreading fast through our communities is also responsible for some of the economic damage.
- This coronavirus spreads asymptomatically, which means people under 50 mingling with each other are deadly threats to people over 50. In particular, to their parents, grandparents, aunts, and neighbors.
- The chance of dying is low for young people, the chance of suffering serious damage to lungs and other internal organs that takes months to recover is a bit higher (some of it may be permanent, but that's yet to be determined).
- The chance of dying for everyone goes up several times if the medical system gets DDoSed by COVID patients.
EDIT:
> It makes little sense to force young people to stay at home and get fired
One of the most important effects of the lockdown being done top-down by governments is that employers can no longer fire people who wanted to protect themselves, their families and their communities from getting sick. Leaving this choice entirely to individuals is in practice equivalent to forcing them to choose between staying safe and having a job.
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.
[1] https://ourworldindata.org/mortality-risk-covid#case-fatalit...
The infection fatality rate and the case fatality rate are two very, very different concepts.
"The IFR differs from the CFR in that it aims to estimate the fatality rate in all those with infection: the detected disease (cases) and those with an undetected disease (asymptomatic and not tested group)... The IFR will always be lower than the CFR..." [1]
Spanish government's estimates of COVID-19's IFR are[2]:
For the age group under 50, the estimated IFR is about 0.003%
For the age group 50 - 69 yo, it's 0.04%
And for those over 70, it's 4.1%
[1] https://en.wikipedia.org/wiki/Case_fatality_rate#Terminology
[2] https://www.mscbs.gob.es/profesionales/saludPublica/ccayes/a... Look for the table on page 15
Keeping all the elderly together in shared living spaces didn't work to their advantage by the way.