That is incorrect. That can take the age and races of those of the 700+ who were infected and adjust for the US population. Indeed a Stanford professor did just that and estimated 0.05% to 1% death rate for the US population. What you are talking about is the R0 (ability to spread), which will be higher on a cruise ship than most cities.
Did you watch the video, starting here? Only 5 minutes of your time.
I think we can have a more informed conversation if you do watch it.
https://youtu.be/-60EvBSLulo?t=700
@ and races” — yeah, this virus mainly affects Orientals.