Occam's razor states: "entities should not be multiplied beyond necessity". Given that viruses have multiple times spread from animals to humans this would be

Occam's razor states: "entities should not be multiplied beyond necessity". Given that viruses have multiple times spread from animals to humans this would be the simplest explanation, favored by Occam's razor. That said, the scientific community has not ruled out a lab leak. The Atlantic generally has very good articles on where the investigation stand, and how different people interpret the probabilities/coincidences. For example https://www.theatlantic.com/science/archive/2021/09/lab-leak-pandemic-origins-even-messier/620209/ https://www.theatlantic.com/science/archive/2021/09/lab-leak... Given that China is not really interested in any conclusion on this topic (except if the virus was imported from a different country) we will probably never know.