The issue here isn’t whether it came from a lab or not at this point. The lab leak theory is probably the only one they actually makes real since from both a scientific and spread/proliferation standpoint.
The issue is why did we (and the rest of the world) decide to allow the alternative scenario flourish as long as it did. And before we get all political, just remember what this type of allegation means, both economically and militarily.
So, this thing came from a Chinese lab and killed millions of people globally and wrecked the world economy. Who is liable and how do you get restitution? Is this a scenario where we go to the world court and demand China makes this right? When they don’t do we bomb them into the Stone Age? Do we embargo China and further tank the global economy? Does everyone globally follow along? What happens is other nations do or do not side with us over this?
The problem with the lab leak theory isn’t that it is plausible or likely, but once proven as true then humans are now liable. It is no longer an act of god but instead negligence by people working at the behest of a foreign government.
Once this Pandora’s box is opened, the world is going to change forever. There is no way for this not to have global repercussions.
So we talk about cause, but we need to accept that this is purposely being obfuscated because once the direct claim is proven, then it is no longer the virus as the bad guy, but instead a country.