[civilized]

You say that

1. Pigs and dogs frequently transmit diseases to humans.

2. SARS-CoV-2 was "very likely" carried to the Wuhan market by humans, since only humans are "known" to catch the virus among species present at the market.

I don't understand why you are so confident in #2 given #1? If animals frequently transmit diseases to humans, why would we assume this did not happen in the Wuhan market case? Have all species present at the market been exhaustively tested and proven not to contract or transmit the virus? That would be news to me. All I know is it's been reported that many species traded at the market are known to harbor coronaviruses.

And what exactly is your theory of the origin? Surely the virus came from somewhere, and didn't just suddenly appear in humans without a source?