Based on the table in the original post the numbers would be something like: 1.75 million over 60s killed. And 0.5 million under 60s killed. Assuming a 70% infection rate. Those are ball park figures i didnt do the exact math.
1. The total deaths in the US was ~2.6M a year. 2. The death rate population wide was ~0.86% a year. If you are an optimist, you say a couple of hundred thousands more death is in the noise, especially since most are seniors. If you are a pessimist, you say adding even a .1% death rate due to the virus is a disaster as you will see >100,000-300,000 deaths, and if it is 1% you are talking about >1-3M, depending on eventual fraction of total population infected. Since I am a pessimist and a baby boomer, I think it is a serious problem. But looking at it from the bright side, by dying off we will be less of a burden to society, solving the SSN and Medicare problems, and leave more inheritances to the Millennials, Gen X, Y and Z.
Even an extra 2.6 million deaths is no big deal. If they die at home. The problem is millions are going to want hospital beds and ventilators.