Don't look into yourself and see what can be fixed, always blame the other.
Unfortunately this kind of measure is going to increase the R0 of the virus, because some people will think "oh I see, the virus is over there, and now the president has closed off that vector."
I can't even tell if this is supposed to be about Trump. Also it doesn't matter.
There are thousands of borders and even more politicians on this planet and if you don't think borders are the scapegoat for problems the world over, then you're really thinking very small.
>You'd have to literally be picking up and flying in planes full of active cases to even match what we have here already
Even one person with corona can do a lot of damage.
For example, a singular person boarded Diamond Princess. The ship had 696 confirmed positive cases and 7 deaths from 1 person who had the virus.
I'm not saying the measure suffices. Obviously domestic travel is also a big issue, as is travel from outside the Schengen area. But being one of the people affected (currently in Schengen), I still believe this is a right step. It might not slow infections down enough but it will certainly prevent many cases. Also, it will remind people how serious the situation is.
There are tens of thousands of incubating cases in the United States already. How exactly is a few dozen sick passengers per day going to affect that at all? You'd have to literally be picking up and flying in planes full of active cases to even match what we have here already.
This is insanity. No one with any expertise at all recommended it. No one serious thinks this is a good idea. It's not going to do anything useful at all.