I guess you are saying that because it was illegal, the Government couldn't find out if it happened. Something like Captain Renault in Casablanca being shocked that gambling was happening around there [1].
"The sale of wild animals without permits in China carries severe penalties involving steep fines and imprisonment. The tick study that documented the sale of illegal animals in the Huanan market observed, however, that the sellers were not too concerned about law enforcement, and that plainly illegal animals were openly sold. It is unclear whether any of the animal traders engaged in illegal wildlife commerce have been since found, fined or punished. The swift clear-out of the market may have been intended to protect them as well as the law-enforcement officers and local politicians who had looked the other way."
I assume "vendors were selling live mammals, including raccoon dogs, hog badgers, and red foxes, immediately before the COVID-19 pandemic" and that was illegal and — at various levels of city and regional government — well known to be happening.
I guess "The animals on these farms (nearly 1 million) were rapidly released, sold, or killed in early 2020…" because those involved in the illegal trade did not wish to be held responsible for a repeat of SARS-CoV-1.
Was selling live bats or live pangolins legal?