I think the Wuhan/COVID/Coronavirus can be compared to the Soviet government's response to Chernobyl. Great efforts were made to keep a lid on that disaster from the people, and the world, until it was too great to ignore. Granted, a long time ago, but it's an example of what a totalitarian government (like China) might do in the face of such catastrophe.
Nobody would sell lab animals from a virology lab to markets to eat. The consequences are obvious, animals would be accounted for, the risk would be extremely high to the persons future, and the profits small.
It's the kind of ideas you find on racist conspiracy theory blogs and you shouldn't share it here.