You did miss one piece of the data pie:
In tropical areas, influenza (the flu) occurs throughout the year. In the Northern Hemisphere, the influenza season typically starts in early fall, peaks in mid-February, and ends in the late spring of the following year. The duration and severity of influenza epidemics vary, however, depending on the virus subtype involved.
The World Health Organization estimates that worldwide, annual influenza epidemics result in about 3-5 million cases of severe illness and about 250,000 to 500,000 deaths. (https://www.medscape.com/answers/219557-3459/what-is-the-global-incidence-of-influenza)
Influenza's mortality rate, then, is 8 to 10 percent.
As of 25 March 2020, the rate of deaths per number of diagnosed cases of Covid 19 is 4.5 percent. (Wikipedia)
Depending on the population slice you take, the mortality rate for the Covid 19 virus ranges from 0.2 percent to 15 percent, according to age group and other health problems. ("Coronavirus (COVID-19) Mortality Rate". www.worldometers.info. 5 March 2020)
So, to quote popular media these days, "We're all gonna die! Quick, buy a lot of toilet paper!"