Total of actual cases which have not been tested has to be much higher, so mortality rate is actually lower than that.
Exactly...
Why does that matter? I understand that there is likely a very large number of unreported coronavirus cases out there, but we should only be concerned with the mortality rate of those who present themselves with the disease. In other words if I show symptoms, I have an X% chance of dying from it. In my state of Virginia, there have been 9,630 reported cases in the last six weeks with 324 deaths. That's a mortality rate of a little under 3.5%. That's significant number of deaths in a state which is not expected to reach it's peak until June, or some say August. What number of lucky people who have been infected and show no symptoms is really only of academic interest.