That this is someone's fault and they can be punished is, I think, the reason people want it to be true. Rather than the world is a terrifying place that sometimes kills millions.
Whether or not someone gets punished is largely irrelevant. It isn't like 1 billion people in China would have sat down and decided to violate lab safety protocols; there'd be some supervisor somewhere who made mistakes. What happens to such a hypothetical person is irrelevant in the scheme of the damage the virus caused.
Both theories would presumably have people that are culpable due to violating safety rules designed to prevent exactly what happened. But I suppose a lab screwing up is more embarrassing to China than a hick selling wild animals or whatever illegally.
But of course, there is considerable bias to view traditional practices like wet markets more favorably than modern practices like virology labs. So, in reality, the virus leaking from a virology lab would be found far more condemnable than the virus being contracted randomly at a wet market.
- No samples were ever found, nor were any sick animals, in the market where it supposedly started. Period. Nothing.
- No evidence of genetic mutations and variants leading up to crossover, no intermediary host ever found.
- It just happened to start infecting people in the city of a lab which had been doing extremely similar experiments AND had issues with releases before.
- WHO rushed the investigation, involved Chinese scientists in the investigation, and the Chinese government did not cooperate in any way, shape, or form - no samples, no lab data, nothing. It was just "trust us." And everyone dusted off their hands and said "well, no evidence. Done then!"
The world's governments pushed the "zoological crossover" theory because the only alternative would be...what? Accusing the world's largest source of manufactured goods of killing 8 million people? And what would we do, exactly?
Level economic sanctions against a country producing most of the world's stuff? That is by and large quite self sufficient, far more so than most nations?
And there's zero evidence to support the lab leak. All the research they were doing on live virus was based on SARS-CoV-1. You can't get SARS-CoV-2 out of that. And while they sequenced RaTG-13, there is no evidence they ever had live virus, and RaTG-13 is still around a thousand mutations and a few decades of evolution away from SARS-CoV-2.
SARS-1 had a CFR of 11% over all ages, 55% for >65. That's about 10x as deadly as SARS-CoV-2. The situations are thus not comparable--with SARS-CoV-2, we'd expect much more cryptic spread before someone gets sick enough to seek medical attention, and illness much more easily misdiagnosed as flu.
There's also zero question that the WIV had unpublished viruses during the pandemic, since they just published 56 new sequences collected "between 2004 and 2021". So do you really think it's impossible that they actually had 57?
I don't give that a lot of credit.