This is a great argument when we're talking about, for example, people working on making phones vs. people working on cancer research -- their efforts aren't interchangeable.
But political capital to examine policy failures? That's a limited precious resource that is all too often redirected towards frivolous, self-interested pursuits by people who are unwilling to examine their own.
China is an easy scapegoat here. You see it all over this thread. Many many americans talking about Chinese policy while their country pretended nothing was happening for months and likely facilitated the virus' travel throughout the US and the world as one of the main epicenters of travel.
American politicians (as well as others'), as well as the beaurocracies under their control, love nothing more than people looking at anyone but them when something goes wrong and they will take advantage of it.