Very similar things happened with hydrochloroquine. HCQ was known effective for SARS-1, and prelim research showed it also was effective for SARS-2 (less grave symptoms developed) in the middle of February. Just did not help when the patient was already severely sick, so was not a cure, as touted by trigger-happy Trump months later. But then all of HCQ was discredited as being useless snake oil, and responsible for killing Americans when they drank aquarium cleaner. It was a political hit job on science, to punish Trump playing lose and politics. None the wiser or the healthier.
Finally. When the virus was not yet a pandemic (but clearly on the way there), the right prepper movement started talking about masks, self-treatment in case of hospital crisis, and food and vitamins (vitamin D and selenium were chosen for their effects against other viruses) to keep immune system healthy. Meanwhile in the US, progressive politicians held mask-less photo opportunities at China Town restaurants to signal their support and that fear is unreasonable. Democrat politicians, former presidents, and public health officials were stating to not buy N95 masks for these were not effective and wearing them would signal you were ill. Then Trump went muh-freedom-america on masks, and the progressive-left opposition to not mask wearing grew overnight.
On all these flip-flops, the US held conflicting positions, and any science was an afterthought. I classify your objection to the official US position on lab leak as lies as part of this politics game. It makes you think of your entire government as a single "bad" figure, blatantly lying or skipping over their intelligence agencies and geopolitics experts, because their irrational hatred for China feels deserving of a big lie. Trump and Pompeo fabricating the lab leak hypothesis seems like a bigger story than the Trump-Ukraine scandal. If you have any actual evidence for that (or strong circumstantial evidence beyond Trump playing loose with facts) then it is your duty to inform the American public of that radical conspiracy.