Scream all you want.
If I die in a car accident tomorrow and test positive for Kung-Flu, I died of Kung-Flu and you know it.
No, because no doctor is risking their medical license, career, and freedom to defraud the Federal government for no benefit.
This conspiracy theory doesn’t play out in real life, because people are reliably unreliable. You’d never every doctor in all 6,000 hospitals on board with this with no upside and huge downsides, to say nothing of the families of over 320,000 dead people. All willing to be party to fraud for no benefit and no apparent reason. Because some bureaucrat in hospital administration says so? Give me a break.