Earlier quoted context omitted.
Until covid-19 has petered out, the comparisons aren't valid. We're not even sure yet where on the upslope of infections we are. It's way too early to compare it the annual rate of anything else.
It's literally just information. I'm comparing current data, which is clearly indicated and sourced.
Note in your first source that the CDC estimates _36 to 51 million_ flu illnesses this season _in the US_. I'm not sure why your third source says "5 million cases".
The flu doesn't originate from a single point geographically every year, as it is already embedded in communities globally.
So, even if the current numbers we have for coronavirus infections are off by an order of magnitude, it is easy to reason that once this coronavirus reaches spread at the levels of the flu (i.e., 30-50 million infections _in the US alone_), the death numbers are likely to be much much higher than the seasonal flu.