I found this recent interview with Christian Drosten [1] very interesting, he explains very good scientifically why it is much more probable that the origin is not from a laboratory. A quick summary of https://www.youtube.com/watch?v=av2Hax3Bg1U (1) The area where the Nyctereutes spec. (german: Marderhund, I have no idea how it is called in english) where kept, there where a lot of DNA of Nyctereutes and a lot of nuc…
now an exact match of that length isn't impossible, but which is more likely? that this managed to be exactly correct on accident? or some grad student was told to just copypasta every furin cleavage site in the database into a GOF library and surprise surprise the most virulent form that became a pandemic came from the sequence that is engineered to be efficient.
any scientist that has any molecular biology wet experience will tell you this is exactly what they would have done (though us researchers would probably not have pulled from the patented BLAST sequences, since that selector is turned off by default by the NCBI)