“So are we to assume the author of this tripe quit his high level tech job and spent 40hr/wk reading up on COVID-19.”
DH’s career/vocation was Physics, with a PhD. His avocation was entirely different, but he became so knowledgeable in that hobby that one branch of the military used a paper he wrote to train troops. It CAN be done.
Medicine is a statistical science. You have either gathered statistics that show your reasoning is correct or you are putting forward speculation. All the reading, knowledge of physiology, pharmacology, infectious disease, or what have you, will not allow you to reason anything to 100% assurity.
Medicine is replete with medications that should work based on our understanding of physiology, for example, but do nothing when they are studied in a clinical trial. Even successful animal trials can come up short when they proceed to human trials.
So a person who reads medical literature as a hobby and believes something with 100% assurity, is fooling themselves at best, trying to con people at worst.
Had the author been honest they would have used phrases like "I have a high suspicion" or "my hypothesis is supported by previous clinical trials". If that were the case I wouldn't have commented on this thread in the first place.