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Do people typically gather in the parking lot of the WIV in large numbers? What was the reproductive rate of the initial version? What was the probability of an infection turning into a severe enough case to register to epidemiologists months later? For a relatively low reproductive rate or severity, you will need a lot of human contact to have detectable cases. The fact that the initial detectable cases are clustered within a nearby population center that manifests many close contacts should be expected.
The market is not near the WIV. They're on opposite sides of a very large city.
"Near" is a relative term. In the context of all the places in China this novel virus could have popped up, it is definitely near. It's also a 45 minute drive from WIV (as stated in another comment). In the context of a location that will attract people from all over the city, it is also near.
It's widely accepted that the Huanan market cases are an early super-spreader event and not the first human infections. Basically we don't know who and where the first infected humans were. We do know lots of people got infected at the market and that became the first time a new pneumonia was noticed in hospitals.
The market was an early superspreading event (or actually multiple superspreading events), I don't know why people conflate spread at the market with a spillover at the market. I guess it made more sense when the virus was thought not to be airborne.