You're just repeating the conclusions of papers that made ridiculous leaps of logic based on circumstantial evidence. For example [1], which is the likely source of the argument you're (mis-)remembering, bases this conclusion on:
1) case histories from reported, hospitalized cases, which were probably incorrect (i.e. they just assume that the cases they know about are, in fact, the first cases), being "geographically centered" on the market in December (not November) of 2019 [2].
2) positive environmental samples near animal stalls in the market, of which they found two strains.
Neither of which is dispositive of anything, and more an indictment of the motivated reasoning of the academic literature at the time than anything else. If you bother to read any of the subsequent analyses, you'll find that there are a bunch of different lines of evidence (genetic and case reports, at the least), pushing the date of the first infections well before December.
In short, the first/WHO case reports were probably wrong, the virus likely broke out earlier and was circulating in Wuhan before these samples were taken. If that's true, it wouldn't be surprising, at all, to find positive environmental samples in a food market, and the tortured logic of this paper would fall apart.
[1] https://www.science.org/doi/10.1126/science.abp8715
[2] Seriously. Not joking. Here's the "methods" they used for this oh-so-rigorous analysis:
> The 2021 WHO mission report identified 174 COVID-19 cases in Hubei Province in December 2019 after careful examination of reported case histories (7). Although geographical coordinates of the residential locations of the 164 cases who lived within Wuhan were unavailable, we were able to reliably extract the latitude and longitude coordinates of 155 cases from maps in the report
They then take this data and blend it through a kernel analysis, wave their hands, and voilá! This this The Science (tm) upon which your confidence is based.
...oh, and by the way: the market in question just happens to be right next to the Wuhan CDC, and a major city hospital [3]. Weird, right? I'm sure it's just a coincidence. Certainly nothing worth including in a putative "probability analysis" of geographic distribution.
[3] https://www.researchgate.net/figure/Map-of-Huanan-Seafood-Ma...