Good point. The best empirical evidence we do have on this isn't usually talked about.
The Princess cruise line incident.
Of fourthousand people, 17% became infected, and while I do need to find my source, and these numbers are off memory, the 17% number I'm sure of.
What I'm also sure of was 4000 people confined together,eating together,breathing through a shared hvac system, sharing handrails aboard ship,tables and chairs.
The final death rate was under 1%, the average age was ten years older than that of americas average age.
Now, 1% of 330 million is 3.3 million, and no one expects these numbers, but we arent aboard ship, and the alert is high now, response and helps better.
On feb 24th
https://thecount.com/2020/02/24/who-died-of-coronavirus-diamond-princess/
The four who had died at the time were all in their eighties,so typical of what we know.
If I can find follow up,or anyone has them, this is by far the best account of expectations, numbers high enough for real data, and people healthy enough to go cruising, which only imparts we need to keep this away from the older folks.