But why would one denial from one particularly finicky funding source (Trump-era US agencies) make researchers – who thought they were doing essential work – stop such essential work? Why wouldn't they use other funding, possibly from overhead funding or prior grants, or from other less-finicky funders? And in a jurisdiction – China – where many of the same limits or reporting-requirements might not exist?
Are virologists the only humans who, thwarted by one jurisdiction's limits, give up without considering doing their career-making, essential-to-humanity work elsewhere?
> …it's incredibly difficult to engineer new viruses… [and] …also incredibly difficult to create stable "gain of function"…
Indeed, but humans do incredibly difficult things all the time. In fact, they're often attracted to the challenge, and seek funding to help them do it, and often don't let a 'no' from any one funder stop them from bootstrapping work in other ways.
It's also incredibly difficult to engineer & get approval for vaccines to a brand-new disease, but that got done, recently, faster than ever before.
It was incredibly difficult to create nuclear weapons, but a lot of countries have done it independently.
Given the significant number of dangerous pathogen escapes from disease labs, it's also "incredibly difficult" to keep dangerous contagions safely contained. It's comparatively easy to accidently let them out!