According to the article, the bat caves are nearly a thousand miles away. It seems unlikely peasants were traveling a thousand miles for the purpose of visting the market.

It also presents some reasons why bat viruses on their own were unlikely to become as contagious as COVID, citing the example of RaTG13's discovery.

So the "zoonotic transfer from bats" theory requires an extraordinary new strain (possible!) to travel a thousand miles before spreading enough to be detected.