I think you are exaggerating the numbers. The 1918 Spanish flu caused 500,000 to 600,000 American deaths. And many if not most of those deaths were not directly from the flu itself but secondary infections of pneumonia. Don’t forget there were no antibiotics then, so pneumonia had no cure. And the present fatality rate is nothing like 2%. You are using the % deaths as among those already diagnosed. But who are they? Mostly those already critically ill, and this come to the attention of the epidemic statisticians. That heavily biases the %death upwards. The actual infected population is certainly much larger. That includes those with mild or no symptoms. That makes the denominator of deaths/infected a far lower number.