The takeaway in any event is it could have come from a lab. That should be enough to trigger some action around biosecurity.
There is no reason to think this won't happen again in our lifetimes. We have this amazing global logistic network that can apparently ferry a virus all over the world in about 3 months. Lab safety has to be beyond question.
I imagine we'll see some monumental changes in Chinese lab safety after this, independent of whether or not they believe it came from a lab.