Either way, it's China's incompetence and reckless endangerment of the rest of the world that has caused this. So the more important question is what we will do about it?
So far the answer seems to be "nothing because the price of cheap plastic shit might go up 2p a tonne and that's more concerning than a global pandemic".
It didn't start at the market. They tested every animal there and found nothing, yet they found many infected people there and found the virus all over surfaces there. The market was an early superspreader event, not the origin.