So, for context, France tried that. Badly, like the rest of our handling of Covid, but we did close restaurants, bars, and everything else, keeping schools open. Not really for the well being of the children, but rather that their parents could not work if they had to handle children.
Depressions are still through the roof, grades are low.
Because you get depressed if you are isolated and you get depressed if you have to fear to get infected.
There is no undepressing way to handle the pandemic, only ways with less infections and deaths.
The way to solve it was to accelerate vaccines even more than we did. A couple trillion dollars to accelerate vaccine production and rollout (and approval) to cut 6 months off the pandemic. Avoided the big wave in December. We already did better than some feared with vaccine roll out, but we could have done even more.
Also, a harder (but shorter) shut down and a firmer masking requirement and really good test and trace and quarantine protocol were additional ways, but apparently not feasible due to having to heard so many cats. Vaccines were more under federal control and could have been accelerated.
Depressions are still through the roof, grades are low.