Earlier quoted context omitted.
Health insurance will be fine. There was a study (no citation handy) that looked at severe flu seasons, and their impact on health insurers. Barely a blip. Remember, ~80% of people have minimal symptoms after being infected with SARS-CoV-2. You can therefore absorb a lot of care for 20%, assuming most people are insured...
This is going to be 20 times worse than the worst flu seasons.
Here's the data from DC on the Flu https://www.cdc.gov/flu/about/burden/past-seasons.html
Over the past decade a low season of 140,000 hospitalizations to a high of 810,000. For this to be 20x worse you'd need each stay from the flu to be 1 day and each for COVID-19 to be 20, and then we'd need to reach somewhere between 700,000 - 4,000,000 positive COVID-19 cases in the U.S. under the current testing methods which leads to approximately a 20% hospitalization rate.
On the death calculation COVID-19 would need to kill 240,000 to 1.2M for a 20x outcome. This is more possible if you go to the low end and we limited mitigation efforts (which we aren't).
Flu, like automobile accidents, are a massive impact on society though because they are now a normal occurrence do not get the media coverage.