I see we've got a Trumpist Conspiracy Theorist on board. Would've been interesting to get entertained. Sadly he's several years late. Covid19 isn't something to joke with.
One thing I thought I'd say: cause of death and diagnosis have not always required complicated tests. Clinical diagnosis has always worked side by side with test based methods. The Spanish Flu and other pandemics were identified solely by the symptoms. Just because a test isn't done doesn't devalue or nullify the clinical conclusion.
The accuracy of the tests has been improving from 60% to now around 75%. It means there are some false positives and negatives..