As with iso1631 there, I disagree. The lockdown will only save significant numbers of lives if it lasts until we have a way to reduce population death rates (either via better treatment, prophylactics, or vaccines) OR if we can exterminate it entirely and prevent COVID-19 from becoming endemic to the US again. I think the latter is unlikely, and the former requires 6+months of lockdown.

If we do three months of lockdown and then people give up and head out as normal again, we've burned a few trillion dollars, and a hundred million years of US citizen lives, for nothing. The deaths still come, just shifted back three months. That's the worst case, and it's what we might be heading for.