The main reason being that it claims to target a virus which no one has adequately proven the existence of, which the “tests” don’t even test for, and which no one has in isolation.
We also know that this virus is different from all the others we know by the gene expression it causes: https://duckduckgo.com/?t=ffnt&q=gene+expression+covid
PCR tests are not perfect because to create one, you have to find a short but unique RNA sequence that can be found in all variants of the virus too. There are many different PCR tests, so attacking all of them by finding a weak one is not really honest. Testing for antibodies works better but is more expensive. Isolating the virus and extracting the RNA is even more expensive, but it was done 200,000 times already.
The databases with the virus samples can be used to make a genealogical tree: https://nextstrain.org/ncov/global?c=recency&l=unrooted
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