You and the people who created the Great Barrington declaration make it sound like "being at risk" is a binary and rare condition. In fact, most people in the US have risk factors[1] like being overweight, physical inactivity, being pregnant (~5% of the total population is pregnant at any point in time), being over 65 (16% of the US population), and many others.
> ~5% of the total population is pregnant at any point in time
That seems (literally) unbelievably high. If you take an average life expectancy in the US of 78 years (it was 79 in 2019), assume roughly equal number of males and females, each female would have to be pregnant for 7.8 of the 78 average years, or 10.4 full-term pregnancies per woman in the US. That can’t possibly be the right figure.
Total estimated pregnancies in US in 2009 (most recent figure I could readily find) was 6,369,000 (4,131,000 live births, 1,152,000 induced abortions, and 1,087,000 fetal losses). If you give all 4.1 M as full term and treat all the others as half-term (a gross over-estimate), you get around 5.2M full term pregnancies or 3.9M years of pregnancy against a US total population of 307M (person-years in 2009) or a bit over 1/4 of your figure.
[1] https://www.cdc.gov/coronavirus/2019-ncov/need-extra-precaut...