You make a good point, but to be clear a lab leak is not "the leading theory", it is a plausible theory.
All of the investigations into the origin of COVID-19 have Daszak on their advisory boards, the conflict of interest is literally insane.
The idea that a lab leak isn't the most likely cause is just willful ignorance at this point.
https://www.cnn.com/videos/health/2021/03/26/sanjay-gupta-ex...
[1] https://news.ycombinator.com/item?id=28656209 [2] https://theintercept.com/2021/09/23/coronavirus-research-gra...