Is there evidence it didn't?
Because the chinese know they have no reason to worry about losing face, having torched all evidence.
The chinese will not allow inspection of the wuhan lab, until completely scrubbed.
Including lab workers disappeared/replaced.
The origin of other pandemics has been rural, where live animals interact with humans. The CCP virus is the first one to originate in a big city of 9 million people. That is strong evidence that the virus mutation from animal to human was not natural.