Because we did it far worse than the US, Belgium, UK, Italy, Spain have a higher death rate per 1k/population than the US.
If we count based on cases, the EU is even worse
US has 4,862,513 cases with 158,968 deaths.
EU has ~3 million with 190 000 deaths.
The difference comes from the way the economy was affected during the lockdown, the US is more consumption inclined than Germany for example, and thus the effect was immediate and far more serious, for the economies than rely on exports and manufacturing the toll is yet to come in full force and a 10% GDP drop is not anything to brag about it. Italy dropped 12.4%, Germany 10.5 %and Spain 18.5%, yet both Italy and Spain were affected almost the same in terms of deaths and cases while Germany went almost unscratched but it still suffered.
And while Japan is almost a model of combating the virus they went also down by 26.3%.
We will have to wait till 2021 to see all the effects of the lockdowns.
The mining industry needs consumers to buy the products made from what you mine if the economies of the other go down there will be a slump in demand and Australia will join the fate of OPEC countries. Just because you make stuff it doesn't mean you will also be able to sell it at a profit.