Earlier quoted context omitted.
No it's not. It's just one guy making up random shit on a blog and is pretending that governments think like him. The reality is probably closer to the fact that there isn't anything governments can do about it. They can try to shut down the borders of the country, but that is going to a lot worse and probably won't stop it anyways. Just because governments can do something and do do something doesn't mean that that…
Denmark did close every school and most administrations. France did not. Many decisions can be taken, but are not (for various reasons). Most experts recommend to limit contacts rather than closing down borders, and no one is pretending to stop the virus but they all should try to flatten the curve. You don't seem to pay attention to the current situation.
At this point we can trust authorities to have a reasonable approach to this and that they monitor the situation closely. Or we can assume they don't.
In the first case, we follow the action plan. In the latter we do what we can, best based on actions that worked elsewhere. Just complaining about how insufficient actions are in our eyes doesn't help.
Anyway, there plans for stuff like this government drawers everywhere. Ranging from school closures to plan keeping critical infrastructure up. Heritage from the cold war.
And even if the US federal government seems to screw up, states like New York and Washington seem to react rather decisively. And we shouldn't forget that things in China are calming down to an extent ad-hoc hospitals are closed down and medical supplies can be shipped to Italy.