The thing is there is no evidence that the virus spread from animals to humans. Of all the animals tested in the market zero tested positive for the virus. And none of the environmental samples showed any signs that an infected animals was present, all the environmental samples were deposited by humans. Since these animals habitats encompass all of southern China and South East asia you'd expect to have found a direct ancestrial strain to be circulating within these animal populations. I mean there are teams going around all of the Wet Markets in Laos and Thailand actively sampling the animals there, and nothing has come up. This is in direct contrast to both SARS and MERS which they initially noticed non human environmental strains not from humans, tested the animals and found anti bodies leading to discover MERS in camels within a year (when total infections worldwide were a couple hundred). And a civet cat in 2003 a few months after the SARS outbreak infected with SARS that matched patient zero with a extra 29-nucleotide sequence unique to civet cats. https://zenodo.org/record/3949022#.Y9hn9uzMJqs.

With SARS2 we have not found ANYTHING! No environmental samples different than the human derived samples. No market animal in China or anywhere else with a variant circulating unique to their species. You'd think if the progenitor to SARS2 was circulating within a species we would have some SOME ANY evidence.