It's not hard to believe that there could be another spillover event, and I don't have any certainty where covid-19 came from, but you're unfairly downplaying the level of circumferential evidence that does exist. There has been a significant effort against evaluating the lab-leak as a reasonable hypothesis (I say that in the scientific meaning of the word), and that effort has significantly damaged the reputation of scientific institutions around the world, and for good reason.