The death rate depends heavily on availability of fairly sophisticated medical care. 10-20% of patients get very sick and need medical support. 5% are critically ill and need ICU care in order to pull through. So if the virus is allowed to "pass through us" without social distancing, quarantines and lockdowns, what you naturally end up with is a huge number of severe cases hitting the hospitals in a short period. Where those medical systems are strained to breaking, you can assume the death rate would be at least 5% and could potentially get as high as 10-15%
I saw a study, among Americans, that my "let it ride" attitude is typical among Republicans, while Democrats want to make any sacrifice to save any life. Which is ironic, because it's mostly old people, who mostly vote Republican, who are in danger.
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