Earlier quoted context omitted.
"while it's deadlier than the flu, it's not that much deadlier" From just a week ago: "Covid deaths three times higher than flu and pneumonia" [1] And that's taking in to account all the lockdown, mask-wearing, and social distancing measures. Without those it'd be even worse. [1] - https://www.bbc.co.uk/news/health-54463511
There's also the issue that cases of flu are remarkably low this year because of all the mask wearing, social distancing &c. Comparing apples to apples, coronaplague is about 10 times as deadly as annual flu.
And yet if COVID-19 was no more dangerous than the flu you'd expect to see equal result form those mask wearing and social distancing measures.. but you don't.
COVID-19 is just way more deadly.