I look at it the other way - that Lab is unlikely to be involved in bioweapons research (see another of my posts above), and even if it was, there’d be even MORE internal containment precautions in the bioweapons section. The last thing the Chinese gov’t would want is a scenario that damages their economy — and that’s exactly where it looks like this is heading.
That fear also explains the seemingly drastic (but may be too late) containment actions: Quarantining several cities is an economic blow, but nothing like the damage if this virus rampages throughout the country.
I’m not saying a lab sourced outbreak is “impossible”, just “unlikely”.
Now, compare that to the immediate region, where you have not just thousands, but probably hundreds of thousands of nice incubators of all sizes (large operations down to backyard livestock slaughtering), with little or no rules, almost no inspections, and Wuhan is a major transportation hub... I’ll post this yet again:
https://www.freerepublic.com/focus/f-news/3810083/posts?page=11#11
There are very good reasons why disease outbreaks emanate from China so frequently, especially now that they’ve built a tremendous transportation system.
“But worries surround the (Wuhan) lab, too. The SARS virus has escaped from high-level containment facilities in Beijing multiple times, notes Richard Ebright, a molecular biologist at Rutgers University in Piscataway, New Jersey. Tim Trevan, founder of CHROME Biosafety and Biosecurity Consulting in Damascus, Maryland, says that an open culture is important to keeping BSL-4 labs safe, and he questions how easy this will be in China, where society emphasizes hierarchy. ‘Diversity of viewpoint, flat structures where everyone feels free to speak up and openness of information are important,’ he says.”