[nradov]

I don't necessarily agree with the lab leak hypothesis but your arguments have some flaws.

Hypothetically a lab worker could have been infected by careless handling of a lab animal rather than a swab. As I'm sure you're aware, viruses can be passaged through transgenic animals as part of gain-of-function research.

There is no reliable evidence that the bat or pangolin species suspected to be the source of zoonotic transmission were sold at the Wuhan Huanan Seafood Wholesale Market. They are not usual foods in the local cuisine.

[jacquesm]

All it would take is a bat taking a dump on a pigsty and then the unlucky pig that now happens to be infected being taken to the market. Which is the most likely backstory of several other bat-to-intermediary-to-human viral jumps. And if you're unlucky the intermediary species doesn't just carry the virus but serves as an amplifier. Hendra for instance.

[nradov]

Fecal-oral transmission of SARS-CoV-2 is suspected to be possible, but I don't think it has ever been definitively established.