[Digory]

Most people grasp the reasonableness standard for running a disease lab: you were negligent if the diseases break containment, because lab standards should be in place to prevent that obvious risk.

Under the wet market scenario, it's not instinctively clear to me what was unreasonable about the practices of the vendors at the market. Does selling bats more likely than not result in spreading disease? Or selling bats in proximity to pangolins? It seems like the vendors were doing the same thing vendors have done for millennia, not doing something unusually or obviously substandard.