Nature paper closes the door on the .'man-made virus' theory mentioned here by fabrice DAVIDand others.
During the last 10 years, an international group of doctors and bio engineers have visited all known places on earth that host bats. They repeated their visits until they found no more new virus. About 300'000 different new bat virus have been found. So we exactly know whether covid-19 is of bat origin or not as it should be derivable from the bat research database.
So far nobody of the bat-team confirmed its a known bat virus. Lets guess how the story will end.
From a tactical point of view nobody has any interest in giving proof that this virus has been engineered, as the result would be: To many questions - blocking research etc../genetic technology.