I'm also going to attack the sources... This was strongly pushed by the Trump administration which was looking for this result. And originally reported by in the WSJ by Michael R. Gordon who is also one of the original reporters about the Iraq Aluminum tubes/centrifuge story that turned out to be wildly false.
It took about 15 years to trace the origins of SARS [1] to a specific bat cave. We cannot be this confident this early on SARS-CoV-2.
[1] https://en.wikipedia.org/wiki/Severe_acute_respiratory_syndr...
Indeed, when I heard of the report about WIV workers being sick with covid-like symptom I immediately checked who reported that, and ended up with the same conclusion as you.
While a lab leak origin cannot be entirely dismissed, one should keep in mind that all this fuss is politicaly motivated.