I don't think anybody doubts that the first superspreader event happened at the Hunan market. The question is whether the first human/animal crossover happened there. With a high k disease like Covid-19 you might very well have a chain of transmission many links long before it starts going exponential as in, for example, what contact tracers uncovered about how the virus first got into France.
Unfortunately, tons of people dispute it still. There's prominent people insisting Covid was in Italy in mid 2019 among other ridiculous things. Unfortunately they're common travelers with the more intellectually honest lab leak folks so it's hard to separate them.
