Occam's razor in terms of scientific theories means choose the theory with the fewest variables, not just compare guesstimated probabilities or something. From

Occam's razor in terms of scientific theories means choose the theory with the fewest variables, not just compare guesstimated probabilities or something. From that, I would guess the poster means the lab leak is preferred as it has only one variable related to the possibility of a leak of viruses that are already there.