This well written NYT may help
https://www.google.com.au/amp/s/www....erica.amp.html
So we don’t really know how many flu deaths a year - as most of those who are presumed to have died from a flu-related illness don’t get tested and are not reported in official figures.
We don’t know how many cases of COVID there have been in Australia - it likely lies between 70,000 (smh report yesterday) and 500,000 (NSW CHO estimate back in July). Either way, we have missed most infections.
It’s all a bit of a mess, but it is what it is. Things are not black or white. Biological systems are not aircraft, and public health is not CASA.