Did you mean 1%?

And what about the percentage with permanent lung damage?

Or if it mutates? Or recovery immunity does not last more than a year or so?

400,000 is just over 0.1% of the total population of approximately 328 Million

I think he meant that your percentage is off. COVID by itself has a 1-2% mortality, not .1%, and has a rapid infection rate. The combined direct and indirect mortality is trending much higher, perhaps double.

That 1-2% number seems to be an extreme exaggeration, mostly peddled by the media. From research it seems to be at 0.66% or so.

That's without taking into account that less than half of the population will get infected.

And if you're concerned about short duration of immunity, we shouldn't drag that thing for a year, everyone should get sick faster.

0.66% if you're one case. More like 4% if there's more cases at the same time than your healthcare system can handle.

Pardon my sloppiness, it is .1% as I'm the one off by a decimal.

And 400,000 is about 1/7th of the number of total deaths in the USA in 2018, according the CDC

https://www.cdc.gov/nchs/products/databriefs/db355.htm

WW2 (for the US) lasted, what, 4 years?

Now concentrate that death toll into 4 months. Or less.

Yeah, 400000 deaths over 4 months would be in the ballpark of the casualties from an Omaha Beach landing every day.

Or like a 9/11 death toll every day for months?

This virus is hitting people with other risk factors hardest - in economic terms it means it's reducing the quality life years the least - when deciding drug funding the high end of $/year is ~200.000k $ - considering the economic damage I would say these measures are well beyond that.