Shutdown for more than 2 months is a huge, colossal blunder. The virus will have a gigantic second wave in December if this is the case. We should let it spread quickly.
There is no treatment for the virus. The only defense is your own immune system, which is why the elderly are dying at such a high rate. After 60, your immune system weakens considerably. People with underlying respiratory conditions and those with compromised immune systems (i.e. people on cancer treatment) are in huge trouble if they catch it. Their only hope is a respirator to help them survive long enough for their body to fight it. As we know, respirators are in short supply.
On top of that, your body does not become immune to it once you recover. There are cases of people getting it, recovering, and then catching it right back again. There is no purpose in letting the population catch the virus.
If the quoted advice were taken, we would be looking at hundreds of thousands dead, likely millions.