In fact, based on the initial footage from Wuhan, countries should have adopted more stringent protocols when they repatriated their nationals, i.e. quarantine on arrival etc... If in doubt throw everything including the kitchen sink at just to be sure. But it is what it is. I just hope we've learnt from this and are prepared for the next one.
Yes it matters. If China (and other orgs) are responsible they should be held criminally and civilly liable. Millions have died on account of what appears to have been reckless and dangerous gain of function research. If there's no accountability, it will happen again.