The Flu season is usually only a few months in winter. We don't know how many people got affected by this yet. 50-80% of people are asymptomatic according to CDC. The virus was in the USA in Late Nov/Early Dec which meant it ran rampant for 4 months. How many people have really been hit by this? Probably tens of millions+. You're using 65 as as the age. Go look at the age from the flu season of 17-18 in the USA. 643 people died under 17 years old, we're not seeing that in this country from COVID.
Did you read my posts from earlier in regards to Sweden, Herd immunity possibly being lower then thought and that the spanish flu of 1918 only affected 28% of Americans. We have to stop using the entire population as a dataset as people who are asymptomatic are going to be the majority of the population.