The PCR test is not designed for diagnosis. The PCR test does not look for the whole Wuhan virus, only a segment of it. That segment could be shared with another corona virus.
So all a positive PR test, even at 24 or less cycles is that it found a segment of a virus that matches what it is looking for, not if it is the Wuhan virus or another corona virus, not how much virus, nor if the virus segment is alive or dead.
But if you are correct then there have been far fewer actual cases but the number of deaths remains static. The numerator remains the same. The denominator is reduced. Fatality rate therefore increases.
Do you accept the validity of antigen tests ? Same for the antibody serological .