I assume virology labs are not randomly distributed across the country, e.g. there could be many reasons why a lab studying coronaviruses might be located in close proximity to an area with a high risk of outbreak.
> We have done bat virus surveillance in Hubei Province for many years, but have not found that bats in Wuhan or even the wider Hubei Province carry any coronaviruses that are closely related to SARS-CoV-2. I don't think the spillover from bats to humans occurred in Wuhan or in Hubei Province.
https://www.sciencemag.org/sites/default/files/Shi%20Zhengli...
The WIV's program to sample novel SARS-like viruses from nature and manipulate them in the lab was the biggest in the world. The only other group that comes close is Ralph Baric's, and Baric has joined the letter in Science calling for further investigation of the origin: