A successful (somewhere between millionaire and billionaire) entrepreneur has put his credibility on the line with those extremely astonishing claims. He put $1M of his own money into an institution to investigate early treatment for Covid, using existing drugs. Donors to CETF include Marc Benioff, Elon Musk Foundation & Vint Cerf, i.e. reputable tech entrepreneurs,
https://www.treatearly.org/donors. The work of CETF was endorsed by staff at Johns Hopkins, Columbia, UCSF, Yale & others,
https://www.treatearly.org/testimonials.
He provided a 30 page document referencing the analysis of other doctors, explaining the rationale for those estimates. He has further offered $1,000,000 dollars to anyone who can show that the estimate is off by a factor of 4X, i.e. making the task easier for the person challenging his extraordinary claims.
His claims are so far from anyone's expectations that it should be trivial to disprove, right? There's a bug bounty of $1M dollars available to anyone. Why is no one bothering to claim it?