So... what data are you using to come up with these numbers?
0.7%?
Live statistics and coronavirus news tracking the number of confirmed cases, recovered patients, tests, and death toll due to the COVID-19 coronavirus from Wuhan, China. Coronavirus counter with new cases, deaths, and number of tests per 1 Million population. Historical data and info. Daily...
www.worldometers.info
If we look at the cruise ship that was 8/712 population I bet skews a little old but they had good medical care that is 1.1%
If we look at Korea they are working through it 104 dead out of 9k infected 1.1% but some cases haven't yet resolved certainly death will be one of the two outcomes.
So 0.7% is maybe a little optimistic in the non-overwhelmed medical system case.
If we go to Italy where they are overwhelmed in the medical system
We have 5.5k dead on 58k cases but 46k undecided cases so that is looking more like 10% but population skews a bit old.
So 7% may be a little optimistic in the overwhelmed medical system case.
I am not a professional statistician so this my own view of the data.
Wash your hands, distance yourself and learn the ukulele