But two of the six factors in that article are hard to explain away, if you want it to be an accidental release from the Wuhan lab:
1. They didn't have any bats,
2. SARS-COV-2 is not a mutagen of RaTG13, because RaTG13 hasn't had long enough (20-50 years) for the necessary mutations to occur.
(I see it like making the strong case for the non-existence of Bigfoot, because there is no "hole" in the animal population that would explain where a breeding number of Bigfootses would get the necessary calories to stay alive.)